Oleg, Luthier, you need to give UBI a damn good bollocking.

[JG52Uther]

Although we are actually being install limited.

''How many activations do I get?
You can indefinitely activate your copy of the game on the same PC. You start with three activations (so, three different PC hardware configurations) to begin with. After one month, one activation will be re-credited (up to a maximum of three available activations at any given time).''

How that ties in with the steam 'just use any computer with your steam details to log in' I have no idea.