Crashes in career mode

I have progressed quite far in the career single player mode, but it keeps crashing every time I try to start the next race.
Birth of muscle race 3. There is no way to quit the race or change the race. Every-time I go into career mode, the race tries to load, fails and the game crashes to desktop.
I spent ages trying to boost up my collector level so I can actually buy the cars I want to drive, but now the game crashes and I cannot progress any further.
I can play any other type of game, but the career always crashes.
Please advise?
Also, what is the best way to get a higher collectors level - especially if I can’t even play career mode?
It really annoying that I can’t but some of my favourite cars.