I wouldn't rely on Shrinkwrap nowadays. I don't think it's been updated for a few years (I might be wrong.) Did u rebuild your desktop when u restarted you mac. Not a bad thing to do after installing new software. If the problem persists, try deleting the LW prefs (.limewire), & then open LW & reset your options for saving, etc. If still probs, run mac's Disk 1st Aid & any 3rd party utilities you might have (eg-Norton Disk Doctor, TechTool Pro, Disk Warrior, etc.)

Do u have any form of security system on your comp.?