Quote Originally Posted by Noxifer View Post
Yes, 2.x is an upgrade of 1.x, but while you can log into the game and play without having bought 3.0, you can't log in with just a 1.x copy of the game (though all 1.x owners got a free upgrade to 2.x).
A complete new client with an own file folder I would not call an "upgrade", more a replacement.