Also, if stop debugging fails, which it often does, then you can never get back to editing code.  It stays in debug mode forever as every time you click stop it fails...  There seems to be no timeout or forcing back to editing mode.  Only way out is to shut mc-studio and restart (after editing your project file as per my previous post).

Edit:  I did however notice that if you click run it will say run failed and then go back to editing mode!