Winamp Pro Free Updates?

[mangothehuman]

Okay, so this is probably a dumb question, but it seems like Winamp has a new update every two weeks. It's never really bothered me, but if I purchase Winamp Pro, are those updates included? Also, will my purchase cover the next version of Winamp (6?). Finally, can I use the same registration for multiple installs as I have more then one computer.

Thank you!