Latest DFX 2 Version is 1.7.5.7.
A few weeks ago, the game was released in europe as retail version on dvd.
In order to play, you must create an account @ Novaworld and add the serial to that account.
Ingame, you have to login with your account now.
For MP thats ok, but you have to do this for Singleplayer, too.
Patching the forced login for Singleplayer is very easy anyway
I just had to trace once without login and once with in order to see what to do.