Hi Karen,
I also had problems with LW 2.8.x freezing and generally not working properly.
I did a search and trashed everything about LimeWire including the prefs.
I reverted to an earlier version 2.7.13 which seems to work ok for me. Maybe this will help.
http://www9.limewire.com:82/download/
I don't know how you can recover earlier version in the LW Pro. I always keep all new LW versions on a zip in case I want to go back.