It’s a pity that one cannot read those dumpfiles yourself, would cause way less posts here.
I de-installed the last W10 update and I can open every older project in C10 again.
So now I am causious to install every upcoming W10 update because I do not know for sure if that was the problem because one can’t read the crashdumps.
Sending to Steinberg is useless becasue of thre always very late reply.