This just happened to me after the new upgrade....

The simple answer is to completely uninstall Limewire....The correct way to uninstall is Start > All programs > Limewire/Uninstaller

Go to the Limewire site and download the new version from there and save it into a folder.

Install the new version from the folder and everything will be back to normal.

This worked for me on all 3 of my computers.....Maxx