I will admit that there's no way to stop the app "animation" once you start it. It's being done in a very simple/stupid way, and the buttons are indeed unresponsive while the animation takes place. I guess I need to do it in a separate thread. However, I have not ever seen the program *crash* during the animation (and I've looked at it a lot). Could you perhaps run the program interactively and force it to crash in that way? If you can produce a core dump file and send it to me, I might be able to debug the problem (privacy warning: if you send me a core dump I can see your private location catalog information).