So this thread is still alive? I never revealed how I solved it. I did not want to tweak with the software, because I wanted a working thing from the supplier and not stick in to many hours of hobbying with no result. So I Explaind the problem to the supplier and followed their suggestions. (see my youtube video above) They had to admit their fault by sending the cinese version. So they sent me the right one and that worked immediately and is still working.
I am only hoping that there will come a new cheap version with still more cpu power and more RAM. But above all more diskspace added for the system drive, because I cannoot upgrade to Windows 10 because of that. Perhaps I could if I remove android, but I don’t want that.