Problem with Navigon 20 Easy!!!

Hello,i recently unlocked this 3.5'' wince6 gps.till today,it worked fine,execpt sometimes it stucked for sometime,and after some soft\hard resets,it was ok again.Today it worked as usually,and when it run out of battery,i pluged it again via usb till the light goes green again.now,it opens and gets stucked at navigon's logo screen...I do have access to both flash and card files via usb,but all files are ok,even if flash's files had a problem,it would start from storage card.I suspect a bug in firmwire,like keeping everything in registry even after a hard reset,i don't know....Does anybody has a registry buckup or the actual firmwire for that?
I am quite sure i didn't bother with any registry thing,so i don't understand how the heck this happened....looks like it stucks at the begginning due out of memory to perform the scripts....

Fixed it....just changed the version number in navigon's xml files to an earlier one ,and i was able to upgrade firm and software....