Relaunch on game crash, log udon exceptions

AppApi.cs

@@ -194,18 +194,22 @@ namespace VRCX
             }
         }
 
-        public void StartGameFromPath(string path, string arguments)
+        public bool StartGameFromPath(string path, string arguments)
         {
             if (!path.EndsWith(".exe"))
                 path = Path.Combine(path, "start_protected_game.exe");
 
+            if (!File.Exists(path))
+                return false;
+
             Process.Start(new ProcessStartInfo
             {
                 WorkingDirectory = Path.GetDirectoryName(path),
                 FileName = path,
                 UseShellExecute = false,
                 Arguments = arguments
-            }).Close();
+            })?.Close();
+            return true;
         }
 
         public void OpenLink(string url)
@@ -428,6 +432,11 @@ namespace VRCX
             return Program.Version;
         }
 
+        public bool VrcClosedGracefully()
+        {
+            return LogWatcher.Instance.VrcClosedGracefully;
+        }
+
         public void ChangeTheme(int value)
         {
             WinformThemer.SetGlobalTheme(value);