You can get your prx's from going into flash0 through recovery mode, or you can download the 3.40 OE-A prx's from this thread which is the same:-
http://www.dcemu.co.uk/vbulletin/sho...y+module+error
Mine crashes and turns off sometimes when I load a map for the first time, all you need to do is restart and try again. You might want to give it a few seconds before clicking X to load the map as I think if you click X too fast after loading MapThis! may be the cause for it not loading and shutting off.