Well, there is still the possibility of a corruption in the preference folder.
Try to delete this folder as described here in Point #2 & 3 in Fixes for Limewire:
http://www.gnutellaforums.com/showth...threadid=36420
If that doesn't solve the problem, try uninstalling LW via START>Programs>LimeWire>uninstall...
After you have done so, search for any remaining file of LW via START>Search...>For files and folders.... using the search query "limewire". Delete all found files and reboot youe computer, then reinstall LW.