I've been using Tuxguitar for well over a year now and Power tab a year before that, tonight I bought Guitar Pro 6 and for some reason it sounds exactly like Tuxguitar which is making me angry. How do I fix this?
What exactly were you expecting?
I've used Guitar Pro before, free trials, it sounds a lot closer to a real guitar than Tuxguitar, I even upload Tuxguitar files that have been converted to a gp file on this website, songsterr.com and they sound like they're supposed to.
The only thing I can think of is the RSE, maybe you have a problem with that? I don't have GP so I can't be too much help.