diff --git a/Cargo.lock b/Cargo.lock
index 79924ba9..20650ec5 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2110,6 +2110,17 @@ dependencies = [
  "objc_exception",
 ]
 
+[[package]]
+name = "objc-foundation"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1add1b659e36c9607c7aab864a76c7a4c2760cd0cd2e120f3fb8b952c7e22bf9"
+dependencies = [
+ "block",
+ "objc",
+ "objc_id",
+]
+
 [[package]]
 name = "objc_exception"
 version = "0.1.2"
@@ -2733,6 +2744,30 @@ dependencies = [
  "winreg 0.10.1",
 ]
 
+[[package]]
+name = "rfd"
+version = "0.10.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0149778bd99b6959285b0933288206090c50e2327f47a9c463bfdbf45c8823ea"
+dependencies = [
+ "block",
+ "dispatch",
+ "glib-sys",
+ "gobject-sys",
+ "gtk-sys",
+ "js-sys",
+ "lazy_static",
+ "log",
+ "objc",
+ "objc-foundation",
+ "objc_id",
+ "raw-window-handle",
+ "wasm-bindgen",
+ "wasm-bindgen-futures",
+ "web-sys",
+ "windows 0.37.0",
+]
+
 [[package]]
 name = "rustc-demangle"
 version = "0.1.22"
@@ -3344,6 +3379,7 @@ dependencies = [
  "rand 0.8.5",
  "raw-window-handle",
  "regex",
+ "rfd",
  "semver",
  "serde",
  "serde_json",
@@ -4304,6 +4340,19 @@ version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
 
+[[package]]
+name = "windows"
+version = "0.37.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "57b543186b344cc61c85b5aab0d2e3adf4e0f99bc076eff9aa5927bcc0b8a647"
+dependencies = [
+ "windows_aarch64_msvc 0.37.0",
+ "windows_i686_gnu 0.37.0",
+ "windows_i686_msvc 0.37.0",
+ "windows_x86_64_gnu 0.37.0",
+ "windows_x86_64_msvc 0.37.0",
+]
+
 [[package]]
 name = "windows"
 version = "0.39.0"
@@ -4413,6 +4462,12 @@ version = "0.42.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "597a5118570b68bc08d8d59125332c54f1ba9d9adeedeef5b99b02ba2b0698f8"
 
+[[package]]
+name = "windows_aarch64_msvc"
+version = "0.37.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2623277cb2d1c216ba3b578c0f3cf9cdebeddb6e66b1b218bb33596ea7769c3a"
+
 [[package]]
 name = "windows_aarch64_msvc"
 version = "0.39.0"
@@ -4425,6 +4480,12 @@ version = "0.42.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e08e8864a60f06ef0d0ff4ba04124db8b0fb3be5776a5cd47641e942e58c4d43"
 
+[[package]]
+name = "windows_i686_gnu"
+version = "0.37.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d3925fd0b0b804730d44d4b6278c50f9699703ec49bcd628020f46f4ba07d9e1"
+
 [[package]]
 name = "windows_i686_gnu"
 version = "0.39.0"
@@ -4437,6 +4498,12 @@ version = "0.42.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c61d927d8da41da96a81f029489353e68739737d3beca43145c8afec9a31a84f"
 
+[[package]]
+name = "windows_i686_msvc"
+version = "0.37.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ce907ac74fe331b524c1298683efbf598bb031bc84d5e274db2083696d07c57c"
+
 [[package]]
 name = "windows_i686_msvc"
 version = "0.39.0"
@@ -4449,6 +4516,12 @@ version = "0.42.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "44d840b6ec649f480a41c8d80f9c65108b92d89345dd94027bfe06ac444d1060"
 
+[[package]]
+name = "windows_x86_64_gnu"
+version = "0.37.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2babfba0828f2e6b32457d5341427dcbb577ceef556273229959ac23a10af33d"
+
 [[package]]
 name = "windows_x86_64_gnu"
 version = "0.39.0"
@@ -4467,6 +4540,12 @@ version = "0.42.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "26d41b46a36d453748aedef1486d5c7a85db22e56aff34643984ea85514e94a3"
 
+[[package]]
+name = "windows_x86_64_msvc"
+version = "0.37.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f4dd6dc7df2d84cf7b33822ed5b86318fb1781948e9663bacd047fc9dd52259d"
+
 [[package]]
 name = "windows_x86_64_msvc"
 version = "0.39.0"
diff --git a/theseus/src/api/jre.rs b/theseus/src/api/jre.rs
index 428104f6..ad0b7b1c 100644
--- a/theseus/src/api/jre.rs
+++ b/theseus/src/api/jre.rs
@@ -1,4 +1,6 @@
 //! Authentication flow interface
+use std::path::PathBuf;
+
 use crate::{
     launcher::download,
     prelude::Profile,
@@ -139,3 +141,8 @@ pub async fn validate_globals() -> crate::Result<bool> {
     let settings = state.settings.read().await;
     Ok(settings.java_globals.is_all_valid())
 }
+
+// Validates JRE at a given at a given path
+pub async fn check_jre(path: PathBuf) -> crate::Result<Option<JavaVersion>> {
+    Ok(jre::check_java_at_filepath(&path))
+}
diff --git a/theseus/src/api/mod.rs b/theseus/src/api/mod.rs
index de53f69d..dfc29b93 100644
--- a/theseus/src/api/mod.rs
+++ b/theseus/src/api/mod.rs
@@ -11,7 +11,7 @@ pub mod tags;
 pub mod data {
     pub use crate::state::{
         DirectoryInfo, Hooks, JavaSettings, MemorySettings, ModLoader,
-        ProfileMetadata, Settings, WindowSize,
+        ProfileMetadata, Settings, Theme, WindowSize,
     };
 }
 
diff --git a/theseus/src/api/pack.rs b/theseus/src/api/pack.rs
index 121d76cc..36fb6b11 100644
--- a/theseus/src/api/pack.rs
+++ b/theseus/src/api/pack.rs
@@ -229,8 +229,8 @@ async fn install_pack(
         .await?;
 
         let loading_bar = init_loading(
-            LoadingBarType::PackDownload { 
-                pack_name ,
+            LoadingBarType::PackDownload {
+                pack_name,
                 pack_id: project_id,
                 pack_version: version_id,
             },
diff --git a/theseus/src/api/process.rs b/theseus/src/api/process.rs
index 3969f255..d350ddc3 100644
--- a/theseus/src/api/process.rs
+++ b/theseus/src/api/process.rs
@@ -1,6 +1,8 @@
 //! Theseus process management interface
 use std::path::{Path, PathBuf};
 
+use uuid::Uuid;
+
 use crate::state::MinecraftChild;
 pub use crate::{
     state::{
@@ -9,31 +11,33 @@ pub use crate::{
     State,
 };
 
-// Gets whether a child process stored in the state by PID has finished
+// Gets whether a child process stored in the state by UUID has finished
 #[tracing::instrument]
-pub async fn has_finished_by_pid(pid: u32) -> crate::Result<bool> {
-    Ok(get_exit_status_by_pid(pid).await?.is_some())
+pub async fn has_finished_by_uuid(uuid: &Uuid) -> crate::Result<bool> {
+    Ok(get_exit_status_by_uuid(uuid).await?.is_some())
 }
 
-// Gets the exit status of a child process stored in the state by PID
+// Gets the exit status of a child process stored in the state by UUID
 #[tracing::instrument]
-pub async fn get_exit_status_by_pid(pid: u32) -> crate::Result<Option<i32>> {
+pub async fn get_exit_status_by_uuid(
+    uuid: &Uuid,
+) -> crate::Result<Option<i32>> {
     let state = State::get().await?;
     let children = state.children.read().await;
-    Ok(children.exit_status(&pid).await?.and_then(|f| f.code()))
+    Ok(children.exit_status(uuid).await?.and_then(|f| f.code()))
 }
 
-// Gets the PID of each stored process in the state
+// Gets the UUID of each stored process in the state
 #[tracing::instrument]
-pub async fn get_all_pids() -> crate::Result<Vec<u32>> {
+pub async fn get_all_uuids() -> crate::Result<Vec<Uuid>> {
     let state = State::get().await?;
     let children = state.children.read().await;
     Ok(children.keys())
 }
 
-// Gets the PID of each *running* stored process in the state
+// Gets the UUID of each *running* stored process in the state
 #[tracing::instrument]
-pub async fn get_all_running_pids() -> crate::Result<Vec<u32>> {
+pub async fn get_all_running_uuids() -> crate::Result<Vec<Uuid>> {
     let state = State::get().await?;
     let children = state.children.read().await;
     children.running_keys().await
@@ -55,62 +59,62 @@ pub async fn get_all_running_profiles() -> crate::Result<Vec<Profile>> {
     children.running_profiles().await
 }
 
-// Gets the PID of each stored process in the state by profile path
+// Gets the UUID of each stored process in the state by profile path
 #[tracing::instrument]
-pub async fn get_pids_by_profile_path(
+pub async fn get_uuids_by_profile_path(
     profile_path: &Path,
-) -> crate::Result<Vec<u32>> {
+) -> crate::Result<Vec<Uuid>> {
     let state = State::get().await?;
     let children = state.children.read().await;
     children.running_keys_with_profile(profile_path).await
 }
 
-// Gets stdout of a child process stored in the state by PID, as a string
+// Gets stdout of a child process stored in the state by UUID, as a string
 #[tracing::instrument]
-pub async fn get_stdout_by_pid(pid: u32) -> crate::Result<String> {
+pub async fn get_stdout_by_uuid(uuid: &Uuid) -> crate::Result<String> {
     let state = State::get().await?;
     // Get stdout from child
     let children = state.children.read().await;
 
     // Extract child or return crate::Error
-    if let Some(child) = children.get(&pid) {
+    if let Some(child) = children.get(uuid) {
         let child = child.read().await;
         Ok(child.stdout.get_output().await?)
     } else {
         Err(crate::ErrorKind::LauncherError(format!(
-            "No child process with PID {}",
-            pid
+            "No child process by UUID {}",
+            uuid
         ))
         .as_error())
     }
 }
 
-// Gets stderr of a child process stored in the state by PID, as a string
+// Gets stderr of a child process stored in the state by UUID, as a string
 #[tracing::instrument]
-pub async fn get_stderr_by_pid(pid: u32) -> crate::Result<String> {
+pub async fn get_stderr_by_uuid(uuid: &Uuid) -> crate::Result<String> {
     let state = State::get().await?;
     // Get stdout from child
     let children = state.children.read().await;
 
     // Extract child or return crate::Error
-    if let Some(child) = children.get(&pid) {
+    if let Some(child) = children.get(uuid) {
         let child = child.read().await;
         Ok(child.stderr.get_output().await?)
     } else {
         Err(crate::ErrorKind::LauncherError(format!(
-            "No child process with PID {}",
-            pid
+            "No child process with UUID {}",
+            uuid
         ))
         .as_error())
     }
 }
 
-// Kill a child process stored in the state by PID, as a string
+// Kill a child process stored in the state by UUID, as a string
 #[tracing::instrument]
-pub async fn kill_by_pid(pid: u32) -> crate::Result<()> {
+pub async fn kill_by_uuid(uuid: &Uuid) -> crate::Result<()> {
     let state = State::get().await?;
     let children = state.children.read().await;
-    if let Some(mchild) = children.get(&pid) {
+    if let Some(mchild) = children.get(uuid) {
         let mut mchild = mchild.write().await;
         kill(&mut mchild).await
     } else {
@@ -119,13 +123,13 @@ pub async fn kill_by_pid(pid: u32) -> crate::Result<()> {
     }
 }
 
-// Wait for a child process stored in the state by PID
+// Wait for a child process stored in the state by UUID
 #[tracing::instrument]
-pub async fn wait_for_by_pid(pid: u32) -> crate::Result<()> {
+pub async fn wait_for_by_uuid(uuid: &Uuid) -> crate::Result<()> {
     let state = State::get().await?;
     let children = state.children.read().await;
     // No error returned for already killed process
-    if let Some(mchild) = children.get(&pid) {
+    if let Some(mchild) = children.get(uuid) {
         let mut mchild = mchild.write().await;
         wait_for(&mut mchild).await
     } else {
@@ -137,18 +141,30 @@ pub async fn wait_for_by_pid(pid: u32) -> crate::Result<()> {
 // Kill a running child process directly, and wait for it to be killed
 #[tracing::instrument]
 pub async fn kill(running: &mut MinecraftChild) -> crate::Result<()> {
-    running.child.kill().await?;
+    running.current_child.write().await.kill().await?;
     wait_for(running).await
 }
 
 // Await on the completion of a child process directly
 #[tracing::instrument]
 pub async fn wait_for(running: &mut MinecraftChild) -> crate::Result<()> {
-    let result = running.child.wait().await.map_err(|err| {
-        crate::ErrorKind::LauncherError(format!(
-            "Error running minecraft: {err}"
-        ))
-    })?;
+    // We do not wait on the Child directly, but wait on the thread manager.
+    // This way we can still run all cleanup hook functions that happen after.
+    let result = running
+        .manager
+        .take()
+        .ok_or_else(|| {
+            crate::ErrorKind::LauncherError(format!(
+                "Process manager already completed or missing for process {}",
+                running.uuid
+            ))
+        })?
+        .await?
+        .map_err(|err| {
+            crate::ErrorKind::LauncherError(format!(
+                "Error running minecraft: {err}"
+            ))
+        })?;
 
     match result.success() {
         false => Err(crate::ErrorKind::LauncherError(format!(
diff --git a/theseus/src/api/profile.rs b/theseus/src/api/profile.rs
index 67293fcf..2a62cac6 100644
--- a/theseus/src/api/profile.rs
+++ b/theseus/src/api/profile.rs
@@ -256,7 +256,7 @@ pub async fn run_credentials(
     .await?;
     let pre_launch_hooks =
         &profile.hooks.as_ref().unwrap_or(&settings.hooks).pre_launch;
-    for hook in pre_launch_hooks.iter() {
+    if let Some(hook) = pre_launch_hooks {
         // TODO: hook parameters
         let mut cmd = hook.split(' ');
         if let Some(command) = cmd.next() {
@@ -336,6 +336,23 @@ pub async fn run_credentials(
 
     let env_args = &settings.custom_env_args;
 
+    // Post post exit hooks
+    let post_exit_hook =
+        &profile.hooks.as_ref().unwrap_or(&settings.hooks).post_exit;
+
+    let post_exit_hook = if let Some(hook) = post_exit_hook {
+        let mut cmd = hook.split(' ');
+        if let Some(command) = cmd.next() {
+            let mut command = Command::new(command);
+            command.args(&cmd.collect::<Vec<&str>>()).current_dir(path);
+            Some(command)
+        } else {
+            None
+        }
+    } else {
+        None
+    };
+
     let mc_process = crate::launcher::launch_minecraft(
         &profile.metadata.game_version,
         &profile.metadata.loader_version,
@@ -347,20 +364,10 @@ pub async fn run_credentials(
         &memory,
         &resolution,
         credentials,
+        post_exit_hook,
         &profile,
     )
     .await?;
 
-    // Insert child into state
-    let mut state_children = state.children.write().await;
-    let pid = mc_process.id().ok_or_else(|| {
-        crate::ErrorKind::LauncherError(
-            "Process failed to stay open.".to_string(),
-        )
-    })?;
-    let mchild_arc = state_children
-        .insert_process(pid, path.to_path_buf(), mc_process)
-        .await?;
-
-    Ok(mchild_arc)
+    Ok(mc_process)
 }
diff --git a/theseus/src/event/emit.rs b/theseus/src/event/emit.rs
index 936924a4..22fb69f1 100644
--- a/theseus/src/event/emit.rs
+++ b/theseus/src/event/emit.rs
@@ -129,7 +129,7 @@ pub async fn emit_warning(message: &str) -> crate::Result<()> {
     Ok(())
 }
 
-// emit_process(pid, event, message)
+// emit_process(uuid, pid, event, message)
 #[allow(unused_variables)]
 pub async fn emit_process(
     uuid: uuid::Uuid,
diff --git a/theseus/src/event/mod.rs b/theseus/src/event/mod.rs
index 4340d3f2..4d3ed130 100644
--- a/theseus/src/event/mod.rs
+++ b/theseus/src/event/mod.rs
@@ -93,7 +93,7 @@ pub enum LoadingBarType {
         pack_name: String,
         pack_id: Option<String>,
         pack_version: Option<String>,
-    }, 
+    },
     MinecraftDownload {
         profile_uuid: Uuid,
         profile_name: String,
@@ -121,11 +121,11 @@ pub struct ProcessPayload {
     pub event: ProcessPayloadType,
     pub message: String,
 }
-#[derive(Serialize, Clone)]
+#[derive(Serialize, Clone, Debug)]
 pub enum ProcessPayloadType {
     Launched,
-    // Finishing, // TODO: process restructing incoming, currently this is never emitted
-    // Finished, // TODO: process restructing incoming, currently this is never emitted
+    Updated, // eg: if the MinecraftChild changes to its post-command process instead of the Minecraft process
+    Finished,
 }
 
 #[derive(Serialize, Clone)]
diff --git a/theseus/src/launcher/download.rs b/theseus/src/launcher/download.rs
index 4b6834e2..6b0ea593 100644
--- a/theseus/src/launcher/download.rs
+++ b/theseus/src/launcher/download.rs
@@ -33,7 +33,7 @@ pub async fn download_minecraft(
         LoadingBarType::MinecraftDownload {
             // If we are downloading minecraft for a profile, provide its name and uuid
             profile_name: profile.metadata.name.clone(),
-            profile_uuid:  profile.uuid,
+            profile_uuid: profile.uuid,
         },
         100.0,
         "Downloading Minecraft...",
diff --git a/theseus/src/launcher/mod.rs b/theseus/src/launcher/mod.rs
index 757b1c0d..2e35fc08 100644
--- a/theseus/src/launcher/mod.rs
+++ b/theseus/src/launcher/mod.rs
@@ -1,10 +1,13 @@
 //! Logic for launching Minecraft
-use crate::{process, state as st};
+use crate::{
+    process,
+    state::{self as st, MinecraftChild},
+};
 use daedalus as d;
 use dunce::canonicalize;
 use st::Profile;
-use std::{path::Path, process::Stdio};
-use tokio::process::{Child, Command};
+use std::{path::Path, process::Stdio, sync::Arc};
+use tokio::process::Command;
 
 mod args;
 
@@ -58,8 +61,9 @@ pub async fn launch_minecraft(
     memory: &st::MemorySettings,
     resolution: &st::WindowSize,
     credentials: &auth::Credentials,
+    post_exit_hook: Option<Command>,
     profile: &Profile, // optional ref to Profile for event tracking
-) -> crate::Result<Child> {
+) -> crate::Result<Arc<tokio::sync::RwLock<MinecraftChild>>> {
     let state = st::State::get().await?;
     let instance_path = &canonicalize(instance_path)?;
 
@@ -182,10 +186,10 @@ pub async fn launch_minecraft(
     // Check if profile has a running profile, and reject running the command if it does
     // Done late so a quick double call doesn't launch two instances
     let existing_processes =
-        process::get_pids_by_profile_path(instance_path).await?;
-    if let Some(pid) = existing_processes.first() {
+        process::get_uuids_by_profile_path(instance_path).await?;
+    if let Some(uuid) = existing_processes.first() {
         return Err(crate::ErrorKind::LauncherError(format!(
-            "Profile {} is already running at PID: {pid}",
+            "Profile {} is already running at UUID: {uuid}",
             instance_path.display()
         ))
         .as_error());
@@ -233,12 +237,15 @@ pub async fn launch_minecraft(
         .stdout(Stdio::piped())
         .stderr(Stdio::piped());
 
-    command.spawn().map_err(|err| {
-        crate::ErrorKind::LauncherError(format!(
-            "Error running Minecraft (minecraft-{} @ {}): {err}",
-            &version.id,
-            instance_path.display()
-        ))
-        .as_error()
-    })
+    // Create Minecraft child by inserting it into the state
+    // This also spawns the process and prepares the subsequent processes
+    let mut state_children = state.children.write().await;
+    state_children
+        .insert_process(
+            uuid::Uuid::new_v4(),
+            instance_path.to_path_buf(),
+            command,
+            post_exit_hook,
+        )
+        .await
 }
diff --git a/theseus/src/state/children.rs b/theseus/src/state/children.rs
index 2599bd25..42cb46a0 100644
--- a/theseus/src/state/children.rs
+++ b/theseus/src/state/children.rs
@@ -1,25 +1,29 @@
+use super::Profile;
 use std::path::{Path, PathBuf};
+use std::process::ExitStatus;
 use std::{collections::HashMap, sync::Arc};
 use tokio::io::{AsyncBufReadExt, BufReader};
+use tokio::process::Child;
+use tokio::process::Command;
 use tokio::process::{ChildStderr, ChildStdout};
 use tokio::sync::RwLock;
 
 use crate::event::emit::emit_process;
 use crate::event::ProcessPayloadType;
-
-use super::Profile;
+use tokio::task::JoinHandle;
+use uuid::Uuid;
 
 // Child processes (instances of Minecraft)
 // A wrapper over a Hashmap connecting PID -> MinecraftChild
-pub struct Children(HashMap<u32, Arc<RwLock<MinecraftChild>>>);
+pub struct Children(HashMap<Uuid, Arc<RwLock<MinecraftChild>>>);
 
 // Minecraft Child, bundles together the PID, the actual Child, and the easily queryable stdout and stderr streams
 #[derive(Debug)]
 pub struct MinecraftChild {
-    pub uuid: uuid::Uuid,
-    pub pid: u32,
+    pub uuid: Uuid,
     pub profile_path: PathBuf, //todo: make UUID when profiles are recognized by UUID
-    pub child: tokio::process::Child,
+    pub manager: Option<JoinHandle<crate::Result<ExitStatus>>>, // None when future has completed and been handled
+    pub current_child: Arc<RwLock<Child>>,
     pub stdout: SharedOutput,
     pub stderr: SharedOutput,
 }
@@ -29,16 +33,18 @@ impl Children {
         Children(HashMap::new())
     }
 
-    // Inserts a child process to keep track of, and returns a reference to the container struct MinecraftChild
+    // Runs the command in process, inserts a child process to keep track of, and returns a reference to the container struct MinecraftChild
     // The threads for stdout and stderr are spawned here
-    // Unlike a Hashmap's 'insert', this directly returns the reference to the Child rather than any previously stored Child that may exist
+    // Unlike a Hashmap's 'insert', this directly returns the reference to the MinecraftChild rather than any previously stored MinecraftChild that may exist
     pub async fn insert_process(
         &mut self,
-        pid: u32,
+        uuid: Uuid,
         profile_path: PathBuf,
-        mut child: tokio::process::Child,
+        mut mc_command: Command,
+        post_command: Option<Command>, // Command to run after minecraft.
     ) -> crate::Result<Arc<RwLock<MinecraftChild>>> {
-        let uuid = uuid::Uuid::new_v4();
+        // Takes the first element of the commands vector and spawns it
+        let mut child = mc_command.spawn()?;
 
         // Create std watcher threads for stdout and stderr
         let stdout = SharedOutput::new();
@@ -55,11 +61,25 @@ impl Children {
             let stderr_clone = stderr.clone();
             tokio::spawn(async move {
                 if let Err(e) = stderr_clone.read_stderr(child_stderr).await {
-                    eprintln!("Stderr thread died with error: {}", e);
+                    eprintln!("Stderr process died with error: {}", e);
                 }
             });
         }
 
+        // Slots child into manager
+        let pid = child.id().ok_or_else(|| {
+            crate::ErrorKind::LauncherError(
+                "Process immediately failed, could not get PID".to_string(),
+            )
+        })?;
+        let current_child = Arc::new(RwLock::new(child));
+        let manager = Some(tokio::spawn(Self::sequential_process_manager(
+            uuid,
+            post_command,
+            pid,
+            current_child.clone(),
+        )));
+
         emit_process(
             uuid,
             pid,
@@ -71,24 +91,88 @@ impl Children {
         // Create MinecraftChild
         let mchild = MinecraftChild {
             uuid,
-            pid,
             profile_path,
-            child,
+            current_child,
             stdout,
             stderr,
+            manager,
         };
+
         let mchild = Arc::new(RwLock::new(mchild));
-        self.0.insert(pid, mchild.clone());
+        self.0.insert(uuid, mchild.clone());
         Ok(mchild)
     }
 
+    // Spawns a new child process and inserts it into the hashmap
+    // Also, as the process ends, it spawns the follow-up process if it exists
+    // By convention, ExitStatus is last command's exit status, and we exit on the first non-zero exit status
+    async fn sequential_process_manager(
+        uuid: Uuid,
+        post_command: Option<Command>,
+        mut current_pid: u32,
+        current_child: Arc<RwLock<Child>>,
+    ) -> crate::Result<ExitStatus> {
+        let current_child = current_child.clone();
+
+        // Wait on current Minecraft Child
+        let mut mc_exit_status;
+        loop {
+            if let Some(t) = current_child.write().await.try_wait()? {
+                mc_exit_status = t;
+                break;
+            }
+        }
+        if !mc_exit_status.success() {
+            return Ok(mc_exit_status); // Err for a non-zero exit is handled in helper
+        }
+
+        // If a post-command exist, switch to it and wait on it
+        if let Some(mut m_command) = post_command {
+            {
+                let mut current_child = current_child.write().await;
+                let new_child = m_command.spawn()?;
+                current_pid = new_child.id().ok_or_else(|| {
+                    crate::ErrorKind::LauncherError(
+                        "Process immediately failed, could not get PID"
+                            .to_string(),
+                    )
+                })?;
+                *current_child = new_child;
+            }
+            emit_process(
+                uuid,
+                current_pid,
+                ProcessPayloadType::Updated,
+                "Completed Minecraft, switching to post-commands",
+            )
+            .await?;
+
+            loop {
+                if let Some(t) = current_child.write().await.try_wait()? {
+                    mc_exit_status = t;
+                    break;
+                }
+            }
+        }
+
+        emit_process(
+            uuid,
+            current_pid,
+            ProcessPayloadType::Finished,
+            "Exited process",
+        )
+        .await?;
+
+        Ok(mc_exit_status)
+    }
+
     // Returns a ref to the child
-    pub fn get(&self, pid: &u32) -> Option<Arc<RwLock<MinecraftChild>>> {
-        self.0.get(pid).cloned()
+    pub fn get(&self, uuid: &Uuid) -> Option<Arc<RwLock<MinecraftChild>>> {
+        self.0.get(uuid).cloned()
     }
 
     // Gets all PID keys
-    pub fn keys(&self) -> Vec<u32> {
+    pub fn keys(&self) -> Vec<Uuid> {
         self.0.keys().cloned().collect()
     }
 
@@ -96,25 +180,25 @@ impl Children {
     // Returns None if the child is still running
     pub async fn exit_status(
         &self,
-        pid: &u32,
+        uuid: &Uuid,
     ) -> crate::Result<Option<std::process::ExitStatus>> {
-        if let Some(child) = self.get(pid) {
-            let child = child.clone();
-            let mut child = child.write().await;
-            Ok(child.child.try_wait()?)
+        if let Some(child) = self.get(uuid) {
+            let child = child.write().await;
+            let status = child.current_child.write().await.try_wait()?;
+            Ok(status)
         } else {
             Ok(None)
         }
     }
 
     // Gets all PID keys of running children
-    pub async fn running_keys(&self) -> crate::Result<Vec<u32>> {
+    pub async fn running_keys(&self) -> crate::Result<Vec<Uuid>> {
         let mut keys = Vec::new();
         for key in self.keys() {
             if let Some(child) = self.get(&key) {
                 let child = child.clone();
-                let mut child = child.write().await;
-                if child.child.try_wait()?.is_none() {
+                let child = child.write().await;
+                if child.current_child.write().await.try_wait()?.is_none() {
                     keys.push(key);
                 }
             }
@@ -126,7 +210,7 @@ impl Children {
     pub async fn running_keys_with_profile(
         &self,
         profile_path: &Path,
-    ) -> crate::Result<Vec<u32>> {
+    ) -> crate::Result<Vec<Uuid>> {
         let running_keys = self.running_keys().await?;
         let mut keys = Vec::new();
         for key in running_keys {
@@ -147,8 +231,8 @@ impl Children {
         for key in self.keys() {
             if let Some(child) = self.get(&key) {
                 let child = child.clone();
-                let mut child = child.write().await;
-                if child.child.try_wait()?.is_none() {
+                let child = child.write().await;
+                if child.current_child.write().await.try_wait()?.is_none() {
                     profiles.push(child.profile_path.clone());
                 }
             }
@@ -163,8 +247,8 @@ impl Children {
         for key in self.keys() {
             if let Some(child) = self.get(&key) {
                 let child = child.clone();
-                let mut child = child.write().await;
-                if child.child.try_wait()?.is_none() {
+                let child = child.write().await;
+                if child.current_child.write().await.try_wait()?.is_none() {
                     if let Some(prof) =
                         crate::api::profile::get(&child.profile_path.clone())
                             .await?
diff --git a/theseus/src/state/settings.rs b/theseus/src/state/settings.rs
index 34e2236e..0bf0ba93 100644
--- a/theseus/src/state/settings.rs
+++ b/theseus/src/state/settings.rs
@@ -1,6 +1,6 @@
 //! Theseus settings file
 use serde::{Deserialize, Serialize};
-use std::{collections::HashSet, path::Path};
+use std::path::Path;
 use tokio::fs;
 
 use super::JavaGlobals;
@@ -13,6 +13,7 @@ const CURRENT_FORMAT_VERSION: u32 = 1;
 #[derive(Serialize, Deserialize, Debug, Clone)]
 #[serde(default)]
 pub struct Settings {
+    pub theme: Theme,
     pub memory: MemorySettings,
     pub game_resolution: WindowSize,
     pub custom_java_args: Vec<String>,
@@ -27,6 +28,7 @@ pub struct Settings {
 impl Default for Settings {
     fn default() -> Self {
         Self {
+            theme: Theme::Dark,
             memory: MemorySettings::default(),
             game_resolution: WindowSize::default(),
             custom_java_args: Vec::new(),
@@ -74,6 +76,15 @@ impl Settings {
     }
 }
 
+/// Theseus theme
+#[derive(Debug, Clone, Copy, Serialize, Deserialize)]
+#[serde(rename_all = "snake_case")]
+pub enum Theme {
+    Dark,
+    Light,
+    Oled,
+}
+
 /// Minecraft memory settings
 #[derive(Serialize, Deserialize, Debug, Clone, Copy)]
 pub struct MemorySettings {
@@ -105,10 +116,10 @@ impl Default for WindowSize {
 #[derive(Serialize, Deserialize, Debug, Clone, Default)]
 #[serde(default)]
 pub struct Hooks {
-    #[serde(skip_serializing_if = "HashSet::is_empty")]
-    pub pre_launch: HashSet<String>,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub pre_launch: Option<String>,
     #[serde(skip_serializing_if = "Option::is_none")]
     pub wrapper: Option<String>,
-    #[serde(skip_serializing_if = "HashSet::is_empty")]
-    pub post_exit: HashSet<String>,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub post_exit: Option<String>,
 }
diff --git a/theseus_gui/src-tauri/Cargo.toml b/theseus_gui/src-tauri/Cargo.toml
index fa64f6a3..895beef0 100644
--- a/theseus_gui/src-tauri/Cargo.toml
+++ b/theseus_gui/src-tauri/Cargo.toml
@@ -19,7 +19,7 @@ theseus = { path = "../../theseus", features = ["tauri"] }
 
 serde_json = "1.0"
 serde = { version = "1.0", features = ["derive"] }
-tauri = { version = "1.2", features = ["protocol-asset", "window-close", "window-create"] }
+tauri = { version = "1.2", features = ["protocol-asset", "window-close", "window-create", "dialog"] }
 tokio = { version = "1", features = ["full"] }
 thiserror = "1.0"
 tokio-stream = { version = "0.1", features = ["fs"] }
diff --git a/theseus_gui/src-tauri/src/api/jre.rs b/theseus_gui/src-tauri/src/api/jre.rs
index 708f7850..bca529d2 100644
--- a/theseus_gui/src-tauri/src/api/jre.rs
+++ b/theseus_gui/src-tauri/src/api/jre.rs
@@ -1,4 +1,4 @@
-use std::path::Path;
+use std::path::{Path, PathBuf};
 
 use crate::api::Result;
 use theseus::prelude::JavaVersion;
@@ -60,3 +60,10 @@ pub async fn jre_get_optimal_jre_key_by_path(path: &Path) -> Result<String> {
 pub async fn jre_validate_globals() -> Result<bool> {
     Ok(jre::validate_globals().await?)
 }
+
+// Validates JRE at a given path
+// Returns None if the path is not a valid JRE
+#[tauri::command]
+pub async fn jre_get_jre(path: PathBuf) -> Result<Option<JavaVersion>> {
+    jre::check_jre(path).await.map_err(|e| e.into())
+}
diff --git a/theseus_gui/src-tauri/src/api/mod.rs b/theseus_gui/src-tauri/src/api/mod.rs
index 672f62a3..800b494d 100644
--- a/theseus_gui/src-tauri/src/api/mod.rs
+++ b/theseus_gui/src-tauri/src/api/mod.rs
@@ -33,6 +33,9 @@ pub enum TheseusSerializableError {
 
     #[error("No profile found at {0}")]
     NoProfileFound(String),
+
+    #[error("Improperly formatted environment variables: {0}")]
+    BadEnvVars(String),
 }
 
 // Generic implementation of From<T> for ErrorTypeA
@@ -74,4 +77,5 @@ impl_serialize! {
     Theseus,
     IO,
     NoProfileFound,
+    BadEnvVars,
 }
diff --git a/theseus_gui/src-tauri/src/api/process.rs b/theseus_gui/src-tauri/src/api/process.rs
index 45b61e8f..87cd0813 100644
--- a/theseus_gui/src-tauri/src/api/process.rs
+++ b/theseus_gui/src-tauri/src/api/process.rs
@@ -2,37 +2,40 @@ use std::path::{Path, PathBuf};
 
 use crate::api::Result;
 use theseus::prelude::*;
+use uuid::Uuid;
 
-// Checks if a process has finished by process PID
+// Checks if a process has finished by process UUID
 #[tauri::command]
-pub async fn process_has_finished_by_pid(pid: u32) -> Result<bool> {
-    Ok(process::has_finished_by_pid(pid).await?)
+pub async fn process_has_finished_by_uuid(uuid: Uuid) -> Result<bool> {
+    Ok(process::has_finished_by_uuid(&uuid).await?)
 }
 
-// Gets process exit status by process PID
+// Gets process exit status by process UUID
 #[tauri::command]
-pub async fn process_get_exit_status_by_pid(pid: u32) -> Result<Option<i32>> {
-    Ok(process::get_exit_status_by_pid(pid).await?)
+pub async fn process_get_exit_status_by_uuid(
+    uuid: Uuid,
+) -> Result<Option<i32>> {
+    Ok(process::get_exit_status_by_uuid(&uuid).await?)
 }
 
-// Gets all process PIDs
+// Gets all process UUIDs
 #[tauri::command]
-pub async fn process_get_all_pids() -> Result<Vec<u32>> {
-    Ok(process::get_all_pids().await?)
+pub async fn process_get_all_uuids() -> Result<Vec<Uuid>> {
+    Ok(process::get_all_uuids().await?)
 }
 
-// Gets all running process PIDs
+// Gets all running process UUIDs
 #[tauri::command]
-pub async fn process_get_all_running_pids() -> Result<Vec<u32>> {
-    Ok(process::get_all_running_pids().await?)
+pub async fn process_get_all_running_uuids() -> Result<Vec<Uuid>> {
+    Ok(process::get_all_running_uuids().await?)
 }
 
-// Gets all process PIDs by profile path
+// Gets all process UUIDs by profile path
 #[tauri::command]
-pub async fn process_get_pids_by_profile_path(
+pub async fn process_get_uuids_by_profile_path(
     profile_path: &Path,
-) -> Result<Vec<u32>> {
-    Ok(process::get_pids_by_profile_path(profile_path).await?)
+) -> Result<Vec<Uuid>> {
+    Ok(process::get_uuids_by_profile_path(profile_path).await?)
 }
 
 // Gets the Profile paths of each *running* stored process in the state
@@ -47,26 +50,26 @@ pub async fn process_get_all_running_profiles() -> Result<Vec<Profile>> {
     Ok(process::get_all_running_profiles().await?)
 }
 
-// Gets process stderr by process PID
+// Gets process stderr by process UUID
 #[tauri::command]
-pub async fn process_get_stderr_by_pid(pid: u32) -> Result<String> {
-    Ok(process::get_stderr_by_pid(pid).await?)
+pub async fn process_get_stderr_by_uuid(uuid: Uuid) -> Result<String> {
+    Ok(process::get_stderr_by_uuid(&uuid).await?)
 }
 
-// Gets process stdout by process PID
+// Gets process stdout by process UUID
 #[tauri::command]
-pub async fn process_get_stdout_by_pid(pid: u32) -> Result<String> {
-    Ok(process::get_stdout_by_pid(pid).await?)
+pub async fn process_get_stdout_by_uuid(uuid: Uuid) -> Result<String> {
+    Ok(process::get_stdout_by_uuid(&uuid).await?)
 }
 
-// Kill a process by process PID
+// Kill a process by process UUID
 #[tauri::command]
-pub async fn process_kill_by_pid(pid: u32) -> Result<()> {
-    Ok(process::kill_by_pid(pid).await?)
+pub async fn process_kill_by_uuid(uuid: Uuid) -> Result<()> {
+    Ok(process::kill_by_uuid(&uuid).await?)
 }
 
-// Wait for a process to finish by process PID
+// Wait for a process to finish by process UUID
 #[tauri::command]
-pub async fn process_wait_for_by_pid(pid: u32) -> Result<()> {
-    Ok(process::wait_for_by_pid(pid).await?)
+pub async fn process_wait_for_by_uuid(uuid: Uuid) -> Result<()> {
+    Ok(process::wait_for_by_uuid(&uuid).await?)
 }
diff --git a/theseus_gui/src-tauri/src/api/profile.rs b/theseus_gui/src-tauri/src/api/profile.rs
index 4db06b70..3a59d0e0 100644
--- a/theseus_gui/src-tauri/src/api/profile.rs
+++ b/theseus_gui/src-tauri/src/api/profile.rs
@@ -1,6 +1,7 @@
 use crate::api::Result;
 use std::path::{Path, PathBuf};
 use theseus::prelude::*;
+use uuid::Uuid;
 
 // Remove a profile
 // invoke('profile_add_path',path)
@@ -73,18 +74,14 @@ pub async fn profile_remove_project(
     Ok(())
 }
 // Run minecraft using a profile using the default credentials
-// Returns a u32 representing the PID, which can be used to poll
+// Returns the UUID, which can be used to poll
 // for the actual Child in the state.
 // invoke('profile_run', path)
 #[tauri::command]
-pub async fn profile_run(path: &Path) -> Result<u32> {
-    let proc_lock = profile::run(path).await?;
-    let pid = proc_lock.read().await.child.id().ok_or_else(|| {
-        theseus::Error::from(theseus::ErrorKind::LauncherError(
-            "Process failed to stay open.".to_string(),
-        ))
-    })?;
-    Ok(pid)
+pub async fn profile_run(path: &Path) -> Result<Uuid> {
+    let minecraft_child = profile::run(path).await?;
+    let uuid = minecraft_child.read().await.uuid;
+    Ok(uuid)
 }
 
 // Run Minecraft using a profile using the default credentials, and wait for the result
@@ -97,21 +94,17 @@ pub async fn profile_run_wait(path: &Path) -> Result<()> {
 }
 
 // Run Minecraft using a profile using chosen credentials
-// Returns a u32 representing the PID, which can be used to poll
+// Returns the UUID, which can be used to poll
 // for the actual Child in the state.
 // invoke('profile_run_credentials', {path, credentials})')
 #[tauri::command]
 pub async fn profile_run_credentials(
     path: &Path,
     credentials: Credentials,
-) -> Result<u32> {
-    let proc_lock = profile::run_credentials(path, &credentials).await?;
-    let pid = proc_lock.read().await.child.id().ok_or_else(|| {
-        theseus::Error::from(theseus::ErrorKind::LauncherError(
-            "Process failed to stay open.".to_string(),
-        ))
-    })?;
-    Ok(pid)
+) -> Result<Uuid> {
+    let minecraft_child = profile::run_credentials(path, &credentials).await?;
+    let uuid = minecraft_child.read().await.uuid;
+    Ok(uuid)
 }
 
 // Run Minecraft using a profile using the chosen credentials, and wait for the result
diff --git a/theseus_gui/src-tauri/src/api/settings.rs b/theseus_gui/src-tauri/src/api/settings.rs
index e9f712a4..87e316ad 100644
--- a/theseus_gui/src-tauri/src/api/settings.rs
+++ b/theseus_gui/src-tauri/src/api/settings.rs
@@ -2,14 +2,17 @@ use crate::api::Result;
 use serde::{Deserialize, Serialize};
 use theseus::prelude::*;
 
+use super::TheseusSerializableError;
+
 // Identical to theseus::settings::Settings except for the custom_java_args field
 // This allows us to split the custom_java_args string into a Vec<String> here and join it back into a string in the backend
 #[derive(Serialize, Deserialize, Debug, Clone)]
 pub struct FrontendSettings {
+    pub theme: Theme,
     pub memory: MemorySettings,
     pub game_resolution: WindowSize,
     pub custom_java_args: String,
-    pub custom_env_args: Vec<(String, String)>,
+    pub custom_env_args: String,
     pub java_globals: JavaGlobals,
     pub default_user: Option<uuid::Uuid>,
     pub hooks: Hooks,
@@ -23,10 +26,16 @@ pub struct FrontendSettings {
 pub async fn settings_get() -> Result<FrontendSettings> {
     let backend_settings = settings::get().await?;
     let frontend_settings = FrontendSettings {
+        theme: backend_settings.theme,
         memory: backend_settings.memory,
         game_resolution: backend_settings.game_resolution,
         custom_java_args: backend_settings.custom_java_args.join(" "),
-        custom_env_args: backend_settings.custom_env_args,
+        custom_env_args: backend_settings
+            .custom_env_args
+            .into_iter()
+            .map(|(s1, s2)| format!("{s1}={s2}"))
+            .collect::<Vec<String>>()
+            .join(" "),
         java_globals: backend_settings.java_globals,
         default_user: backend_settings.default_user,
         hooks: backend_settings.hooks,
@@ -40,7 +49,25 @@ pub async fn settings_get() -> Result<FrontendSettings> {
 // invoke('settings_set', settings)
 #[tauri::command]
 pub async fn settings_set(settings: FrontendSettings) -> Result<()> {
+    let custom_env_args: Vec<(String, String)> = settings
+        .custom_env_args
+        .split_whitespace()
+        .map(|s| s.to_string())
+        .map(|f| {
+            let mut split = f.split('=');
+            if let (Some(name), Some(value)) = (split.next(), split.next()) {
+                Ok((name.to_string(), value.to_string()))
+            } else {
+                Err(TheseusSerializableError::BadEnvVars(
+                    "Invalid environment variable: {}".to_string(),
+                )
+                .into())
+            }
+        })
+        .collect::<Result<Vec<(String, String)>>>()?;
+
     let backend_settings = Settings {
+        theme: settings.theme,
         memory: settings.memory,
         game_resolution: settings.game_resolution,
         custom_java_args: settings
@@ -48,7 +75,7 @@ pub async fn settings_set(settings: FrontendSettings) -> Result<()> {
             .split_whitespace()
             .map(|s| s.to_string())
             .collect(),
-        custom_env_args: settings.custom_env_args,
+        custom_env_args,
         java_globals: settings.java_globals,
         default_user: settings.default_user,
         hooks: settings.hooks,
diff --git a/theseus_gui/src-tauri/src/main.rs b/theseus_gui/src-tauri/src/main.rs
index 70419043..81b1ec5e 100644
--- a/theseus_gui/src-tauri/src/main.rs
+++ b/theseus_gui/src-tauri/src/main.rs
@@ -58,17 +58,18 @@ fn main() {
             api::jre::jre_validate_globals,
             api::jre::jre_get_optimal_jre_key,
             api::jre::jre_get_optimal_jre_key_by_path,
-            api::process::process_get_all_pids,
-            api::process::process_get_all_running_pids,
-            api::process::process_get_pids_by_profile_path,
+            api::jre::jre_get_jre,
+            api::process::process_get_all_uuids,
+            api::process::process_get_all_running_uuids,
+            api::process::process_get_uuids_by_profile_path,
             api::process::process_get_all_running_profile_paths,
             api::process::process_get_all_running_profiles,
-            api::process::process_get_exit_status_by_pid,
-            api::process::process_has_finished_by_pid,
-            api::process::process_get_stderr_by_pid,
-            api::process::process_get_stdout_by_pid,
-            api::process::process_kill_by_pid,
-            api::process::process_wait_for_by_pid,
+            api::process::process_get_exit_status_by_uuid,
+            api::process::process_has_finished_by_uuid,
+            api::process::process_get_stderr_by_uuid,
+            api::process::process_get_stdout_by_uuid,
+            api::process::process_kill_by_uuid,
+            api::process::process_wait_for_by_uuid,
         ])
         .run(tauri::generate_context!())
         .expect("error while running tauri application");
diff --git a/theseus_gui/src/helpers/jre.js b/theseus_gui/src/helpers/jre.js
index 4799fc6d..bb5f8c34 100644
--- a/theseus_gui/src/helpers/jre.js
+++ b/theseus_gui/src/helpers/jre.js
@@ -44,6 +44,12 @@ export async function validate_globals() {
   return await invoke('jre_validate_globals')
 }
 
+// Gets java version from a specific path by trying to run 'java -version' on it.
+// This also validates it, as it returns null if no valid java version is found at the path
+export async function get_jre(path) {
+  return await invoke('jre_get_jre', { path })
+}
+
 // Gets key for the optimal JRE to use, for a given profile path
 // The key can be used in the hashmap contained by JavaGlobals in Settings (if it exists)
 export async function get_optimal_jre_key_by_path(path) {
@@ -52,7 +58,7 @@ export async function get_optimal_jre_key_by_path(path) {
 
 // Gets key for the optimal JRE to use, for a given profile
 // The key can be used in the hashmap contained by JavaGlobals in Settings (if it exists)
-export async function get_optimal_jre_ke(path) {
+export async function get_optimal_jre_key(path) {
   return await invoke('jre_get_optimal_jre_key', { path })
 }
 
diff --git a/theseus_gui/src/helpers/process.js b/theseus_gui/src/helpers/process.js
index 30a395c0..905c79d6 100644
--- a/theseus_gui/src/helpers/process.js
+++ b/theseus_gui/src/helpers/process.js
@@ -5,34 +5,34 @@
  */
 import { invoke } from '@tauri-apps/api/tauri'
 
-/// Gets if a process has finished by PID
+/// Gets if a process has finished by UUID
 /// Returns bool
-export async function has_finished_by_pid(pid) {
-  return await invoke('process_has_finished_by_pid', { pid })
+export async function has_finished_by_uuid(uuid) {
+  return await invoke('process_has_finished_by_uuid', { uuid })
 }
 
-/// Gets process exit status by PID
+/// Gets process exit status by UUID
 /// Returns u32
-export async function get_exit_status_by_pid(pid) {
-  return await invoke('process_get_exit_status_by_pid', { pid })
+export async function get_exit_status_by_uuid(uuid) {
+  return await invoke('process_get_exit_status_by_uuid', { uuid })
 }
 
 /// Gets all process IDs
 /// Returns [u32]
-export async function get_all_pids() {
-  return await invoke('process_get_all_pids')
+export async function get_all_uuids() {
+  return await invoke('process_get_all_uuids')
 }
 
 /// Gets all running process IDs
 /// Returns [u32]
-export async function get_all_running_pids() {
-  return await invoke('process_get_all_running_pids')
+export async function get_all_running_uuids() {
+  return await invoke('process_get_all_running_uuids')
 }
 
 /// Gets all running process IDs with a given profile path
 /// Returns [u32]
-export async function get_pids_by_profile_path(profile_path) {
-  return await invoke('process_get_pids_by_profile_path', { profile_path })
+export async function get_uuids_by_profile_path(profile_path) {
+  return await invoke('process_get_uuids_by_profile_path', { profile_path })
 }
 
 /// Gets all running process IDs with a given profile path
@@ -47,19 +47,19 @@ export async function get_all_running_profiles(profile_path) {
   return await invoke('process_get_all_running_profiles', { profile_path })
 }
 
-/// Gets process stderr by PID
+/// Gets process stderr by UUID
 /// Returns String
-export async function get_stderr_by_pid(pid) {
-  return await invoke('process_get_stderr_by_pid', { pid })
+export async function get_stderr_by_uuid(uuid) {
+  return await invoke('process_get_stderr_by_uuid', { uuid })
 }
 
-/// Gets process stdout by PID
+/// Gets process stdout by UUID
 /// Returns String
-export async function get_stdout_by_pid(pid) {
-  return await invoke('process_get_stdout_by_pid', { pid })
+export async function get_stdout_by_uuid(uuid) {
+  return await invoke('process_get_stdout_by_uuid', { uuid })
 }
 
-/// Kills a process by PID
-export async function kill_by_pid(pid) {
-  return await invoke('process_kill_by_pid', { pid })
+/// Kills a process by UUID
+export async function kill_by_uuid(uuid) {
+  return await invoke('process_kill_by_uuid', { uuid })
 }
diff --git a/theseus_gui/src/helpers/profile.js b/theseus_gui/src/helpers/profile.js
index dcd9f312..198f43e0 100644
--- a/theseus_gui/src/helpers/profile.js
+++ b/theseus_gui/src/helpers/profile.js
@@ -6,12 +6,21 @@
 import { invoke } from '@tauri-apps/api/tauri'
 
 // Add empty default instance
-export async function addDefaultInstance() {
+export async function create_empty() {
   return await invoke('profile_create_empty')
 }
 
-/// Creates instance
-/// Returns a path to the profile created
+/// Add instance
+/*
+    name: String,           // the name of the profile, and relative path to create
+    game_version: String,   // the game version of the profile
+    modloader: ModLoader,   // the modloader to use
+    - ModLoader is an enum, with the following variants: Vanilla, Forge, Fabric, Quilt
+    loader_version: String, // the modloader version to use, set to "latest", "stable", or the ID of your chosen loader
+    icon: Path,  // the icon for the profile
+    - icon is a path to an image file, which will be copied into the profile directory
+*/
+
 export async function create(name, game_version, modloader, loader_version, icon) {
   return await invoke('profile_create', { name, game_version, modloader, loader_version, icon })
 }
diff --git a/theseus_playground/src/main.rs b/theseus_playground/src/main.rs
index 4eaf86d5..2179d0bf 100644
--- a/theseus_playground/src/main.rs
+++ b/theseus_playground/src/main.rs
@@ -33,6 +33,8 @@ async fn main() -> theseus::Result<()> {
     // Initialize state
     let st = State::get().await?;
     st.settings.write().await.max_concurrent_downloads = 5;
+    st.settings.write().await.hooks.post_exit =
+        Some("echo This is after Minecraft runs- global setting!".to_string());
     // Changed the settings, so need to reset the semaphore
     st.reset_semaphore().await;
 
@@ -88,11 +90,11 @@ async fn main() -> theseus::Result<()> {
     // (ie: changing the java runtime of an added profile)
     println!("Editing.");
     profile::edit(&profile_path, |_profile| {
-        // Eg: Java- this would let you change the java runtime of the profile instead of using the default
-        // use theseus::prelude::jre::JAVA__KEY;
-        // profile.java = Some(JavaSettings {
-        // jre_key: Some(JAVA_17_KEY.to_string()),
-        //     extra_arguments: None,
+        // Add some hooks, for instance!
+        // profile.hooks = Some(Hooks {
+        //     pre_launch: Some("echo This is before Minecraft runs!".to_string()),
+        //     wrapper: None,
+        //     post_exit: None,
         // });
         async { Ok(()) }
     })
@@ -108,22 +110,22 @@ async fn main() -> theseus::Result<()> {
     println!("running");
     // Run a profile, running minecraft and store the RwLock to the process
     let proc_lock = profile::run(&canonicalize(&profile_path)?).await?;
+    let uuid = proc_lock.read().await.uuid;
+    let pid = proc_lock.read().await.current_child.read().await.id();
 
-    let pid = proc_lock
-        .read()
-        .await
-        .child
-        .id()
-        .expect("Could not get PID from process.");
-    println!("Minecraft PID: {}", pid);
+    println!("Minecraft UUID: {}", uuid);
+    println!("Minecraft PID: {:?}", pid);
 
     // Wait 5 seconds
-    println!("Waiting 5 seconds to gather logs...");
-    sleep(Duration::from_secs(5)).await;
-    let _stdout = process::get_stdout_by_pid(pid).await?;
-    let _stderr = process::get_stderr_by_pid(pid).await?;
-    // println!("Logs after 5sec <<< {stdout} >>> end stdout");
+    println!("Waiting 20 seconds to gather logs...");
+    sleep(Duration::from_secs(20)).await;
+    let stdout = process::get_stdout_by_uuid(&uuid).await?;
+    println!("Logs after 5sec <<< {stdout} >>> end stdout");
 
+    println!(
+        "All running process UUID {:?}",
+        process::get_all_running_uuids().await?
+    );
     println!(
         "All running process paths {:?}",
         process::get_all_running_profile_paths().await?