EDIT:
haha, what a mess, ok here's the story...
the EVIL DRUMS SDX license is transferable in general but the store i got my copy from
sold me one that was "branded" as non transferable. these packages were used by TT
as gifts/promotion etc. if i got this right, the shop wasn't even allowed to sell this one...WTF!?
i'll contact the store tomorrow and see what i can do...