I had the same problem....it had to do on the set up when I was telling LW where it could look for other people to get files from me....if i told it Itunes it would freeze up and I would have to force a Restart....
My suggestion....use Sherlock to trash everything that says Limewire and Empty Trash,,,,,Including the Installer....( you can keep the LimeWireMac.bin file)...start the reinstall form the .bin file....
and when it comes to the setting preferences keep it simple...
good luck
russ
russkellgraphics@houton.rr.com