update failed for xbian-package-config

[min]

I'm on rc2 with Gotham nightly installed.

First I tried to update via xbian menu, system crashed.

Second I tried to do apt-get upgrade, then I get the error above.

Now I cannot access xbian-config via ssh or xbmc menu, as if there is no xbian-config on my system. Xbmc gives a 'script failed! Xbian-config.py' on boot.

I have tried downloading the xbian-config deb and installing manually but I get the error about not being able to backup symlink.

Is there a way to purge and reinstall xbian-config safely?