Hi Nico,
No problems here with Windows 10.
Try completely removing the driver first.
1. Uninstall the Cam86 driver (from Control Panel)
2. Open Windows Explorer and browse to
C:\Program Files\Common Files\ASCOM\Camera
or if you are using 64-bit Windows to
C:\Program Files (x86)\Common Files\ASCOM\Camera
3. You will see the Cam86 folder there. You want to delete that folder.
(By the way, can you check if the cam86.dll is in the folder first before deleting it).
4. Reinstall the driver and try again.
Let me know if you still have problems.