ngmm,
Your incomplete files may have become corrupted and need to start over. More info in these threads:
http://www.gnutellaforums.com/showth...threadid=49453 http://www.gnutellaforums.com/showth...hlight=dat+bak
You should be able to uninstall either program without effecting your library, but you'll need to back up your incomplete files folder if you want to save them.
Uninstall using the uninstall.exe that came with the program and not the add/remove programs. The location should be C:\Program Files\FrosyWire\uninstall.exe or C:\Program Files\LimeWire\uninstall.exe.