Thank you Mark, seems to be the same problem.
Followed Gnobelix solution, after uninstalling the driver the beta works fine. Reinstalled the driver the beta crashes again. When I disable the HID pen in the device manager the beta doesn't crash even with the Gaomon driver installed.
Just figured out that AP, AD and even Photoshop don't work with the tablet any longer.
Edit: I'm such an idiot: pen battery was down, that's why the pen didn't work in regular versions of AP and AD! So following Gnobelix' solution works fine with my system, disabling the HID pen helps and the beta doesn't crash any longer! Thank you very much for your help Mark