There's apparently a bug with the update feature for Pro users. See et voilà's post here: http://www.gnutellaforums.com/showth...949#post161949
So I'd recommend you go to your personal Pro downld page (I'm sure you have it bookmarked by now) & downld it again.
But then if the fix is already applied then it might not happen again even for this version I'm not sure.