A new version of the driver (0.8.1) has been released on the github.
I made the driver report strictly as 32-bit and cannot be selected from the 64-bit applications any more. This was the problem, at least on my computer. It looks like some Windows update changed something and 64-bit mode was attempted by default... or something like that
By the way, the ASCOM diagnostics can choose devices in 64-bit or in 32-bit modes and obviously the attempts to use it in 64-bit mode were not working.
Nico, can you try this driver and report.
I will look into make the driver 32 and 64-bit compatible but it will need a lot of work. Most of the ASCOM applications are 32-bit anyway so I don't think there is a rush.