Try to delete your limewire preference folder when LW is completely closed (i.e. also in the system tray).
The folder is called " LimeWire" (for the 4.12. version) and can be found in your hidden Application Data folder (on my comp. it looks like this " C:\Documents and Settings\Administrator.MICROSOF-4FD83F\Application Data\LimeWire).
Delete the complete folder. When you reopen LW you'll have to reconfigure LW (i.e. Language, Share Folder, etc.).
If you had an older version installed before the 4.12. version, try also to delete the old preference folder called " .limewire ". Read on how to find and delete it here: (Point #2 & 3 in Fixes for Limewire)
http://www.gnutellaforums.com/showth...threadid=36420 