Altermively you can try to remove apps in xterm as root:
Where appname is the app you want to remove. It should remove the app and its directories. This is a bit dangerous though, because you might remove important folders although it nevr did damage in my experience and is better than "apt-get remove" (which the hildon app manager uses) in my opinion.

Purge should remove the /home/.xxxx folder related to that app.

Here's a good discussion for your benefit: http://ubuntuforums.org/showthread.php?t=790141