No preview of CR2 files in bridge -> unknown file type :(

Hi,

need urgent some help. After the latest camera raw and photoshop update I can't open my previously working cr2 files of my canon mk4.
I can't even see the preview. So I started shooting with cr2 and jpg only to see the preview of jpg files.
When I try to open the jpg file from the flashcard of the cam it appears "file can not be found"
And yes, I have already reseted my old preferences of photoshop according to the instruction.