Hi,
In my case, nothing work.
No cars, not even in free play, none of the 3 races (Monté Carlo, Germany & Sweden) in Career mode, and always asking to buy them while it's already done and installed (according to the Store)...
I did all the tricks up there, nothing work.
The only things I have is the 800.000CR and the Season 2 logo on top right of the main screen, that's all.
I have send a mail to support, hoping an answer, if not, 90€ thrown to basket.
Fahren7