Dear Shai,
I am also trying to evaluate the FXLS8974CF with a FDRM-K22F board and I am facing the same problem.
I tried to run the demo of FXLS8962AF, since it should be 100% compatible, but I had no luck both with freeMaster and freedom sensor toolbox.
So I would highly appreciate if ypu could share any solution you found or received.
Kind Regards,
Federico