Interesting, Cor-e. I just scanned through their file Shareaza Quick Guide 2.3.exe (with UltraEdit-32) and there's so much (apparently - least it looks like) program code in it that I don't feel much inclined to run it to find out wtf it is! (And you are an ex-KaZaA user, are you not? - I'm guessing from the way you capitalized ShareAza )

@Peerless: I got it direct from Phoenix Labs (link), billed as: "Home of the original PeerGuardian 2".