A suggestion from another post.

Delete Limewire and reinstall. That includes deleting the incomplete folder and the download folder (you can move the files out of it) and then reinstall.

This happened after a hardware instal. I would recommend resetting your PRAM. It's usually done by holding down command-option-P-R on most comptuers.

By doing this, you will lose a few basic system preferences, but don't worry, nothing major that can't be put back in about five minutes.