All that does in delete your LW preferences folder called .limewire but the next time you open LW, it will create a fresh .limewire folder. See the image samples at the bottom of the link-page I gave above. Very easy to do. It has nothing to do with your downlds or incomplete files. But just make a note of the settings such as where your downld folder is situated so you choose to make it the same after you open LW next time. If it is the default location then nothing to think about.