App World won't run

(I searched, I swear...)

'Got a notice that there was an update for Evernote. I fired up App World and had it start the update. A minute later (not long enough for it to finish, I'm sure), I notice that the phone (9650, OS6) is rebooting. Now, App World is running in background...but that's it. I can't access it or do anything with it. Deleted, rebooted, and reinstalled OTA...no change. I didn't even start it again manually...it was running in background after the reboot.

Suggestions much appreciated...thanx.