as to your other questions:

I would recommend that you uninstall everything that you got from them. You have no idea of the things some of these scamsites put in their software.

Like the NetSpyProtector. It could be giving them more info on you instead of protecting you. Helping them come up with even more targeted scams.

Codecs to play movies are almost always free (some do have advanced encoding options and such which do cost). Again here you have no idea what they might have put in there.

Try the Beta and see how it works. It works well for most people

Links to download and changelog in this thread:

http://www.gnutellaforums.com/showthread.php?t=63125