Had the same problem on my Mac...wasted hours and hours on inexplicably unusable downloads. I did not go PRO. Would have if the thing had worked. Got a copy of Acquisition for Mac OSX. Good interface...gnutella network, ultrapeer, etc. Worked perfectly. Very Mac-like, for those of you who use Macs. Paid the $15 shareware fee for nag-free file sharing. Files that wouldn't work via Limewire...no problem with Acquisition. Go to Versiontracker and do a search...it's there. (Also tried Neo and Myster...both crashed repeatedly. Must be my computer...oh, Acquisition works, so maybe it's the software!)