Broken After 2.1 Update

[hobogiggedy]

Last night I got a pop-up within XBMC saying that there was a new update to 2.1 available. I went ahead and updated it figuring, probably wrongly, that if the message was coming up in XBMC it was safe to go ahead.

Since the update was applied the Pi froze, rebooted and is now stuck on the XBian splash screen. I can still ssh into the Pi and everything else seems to be running normally. Is there any way to roll back the XBMC installation or otherwise fix it without reinstalling the lot? I have a lot of custom scripts and such running on this Pi and it would take me quite a while to get it all set up again.

Any help would be great!