Improve game-running exit message

release_notes.txt

@@ -0,0 +1,19 @@
+v0.1.0 — First public release
+
+NotAlterra is an unofficial Subnautica 2 save-file manager.
+Cross-platform terminal application.  No admin, no network.
+
+Pre-compiled binaries — no installation, no dependencies.  Just download,
+extract, and run.
+
+Features:
+• Recover .sav from .bak with rollback and slot-aware targeting
+• Full backup / restore (savegame_* files only) with pre-restore snapshots
+• UE5 Config (.ini) management — backup, restore, guarded delete
+• GVAS save inspector with full metadata dump
+• Online / Local detection with mode-change and name-change warnings
+• Auto-locates save folders (Windows, Proton/Steam Deck)
+• Game-running guard, transaction log, and backup safety checks
+• Keyboard-driven TUI with popups, pickers, and resize support
+
+Builds:  Linux (amd64)  •  Windows x64 console

src/main.rs

@@ -143,7 +143,12 @@ fn run_app<B: Backend>(terminal: &mut Terminal<B>) -> Result<()> {
 
     // Guard: exit if game is running
     if guard::game_running() {
-        println!("Subnautica 2 is running. Close the game and relaunch NotAlterra.");
+        println!("NotAlterra has detected that Subnautica 2 is currently running.\n");
+println!("The game holds file locks on your save files while active.");
+println!("Backing up or restoring saves while the game is running can result in");
+println!("incomplete, corrupt, or overwritten save files.\n");
+println!("To protect your save files, NotAlterra will now exit.\n");
+println!(" → Close Subnautica 2, then relaunch NotAlterra.");
         return Ok(());
     }