This same thing happened to me.
I authorized EZ Drummer 2 in my main DAW (Renoise), however
upon trying to open EZ Drummer 2 in Ableton live it asked me to authorize again. Upon trying to log in and authorize it in the 2nd DAW (which I shouldn’t have to do anyways) it says “Authorization failed. Contact Support”. I tried the offline authorization and it said “wrong file?” I tried downloading a new authorization file…that didnt work either.
I’ve read through the FAQ and a lot of the forums…it says to authorize it in the hardware state that you intend to use it…which I have done. That doesn’t work either.
I tried opening and authorizing EZ Drummer 2 in Toontrack Solo but it EZ Drummer 2 doesn’t appear on the list of “add drummer”!!!!
HELP, PLEASE?! 
