Use your computer's search to look for some of the file names. If they're not found, try one of the file recovery utilities here. I think a few people have had success using Restoration.
Deleting files from LW library - Don't!! File recovery advice

LW versions 4.13.0 onwards (Beta versions) send files to the recycle bin if they're deleted from LW's library. The latest Beta version is 4.13.2. If you're interested in trying it, you can download it from the usual LW download page.
LimeWire: The Official Site for the Fastest File Sharing Program on the Planet
Or from your personal download link, if you have Pro.