I'd say reinstall WITHOUT keeping old add-ons, and port fowarding has nothing to do with this.I'm guessing, despite you saying that what you use worked fine, it's probably an add-on conflicting with another add-on, so reinstall.
Crap no edit button. Does re installing make me lose RTB?
rtb is an addon, so yes. If you looked at the console log like we said, you could find the bad addon and not have to reinstall at all.
1. Corrupt Add-on - Likely2. Firewall? - Not Likely
Just reinstall the whole game. It takes a minute to re-download RTB.