Tried restore - didn’t work.
But this is interesting:
I tried to install the 1.9.11 driver again. The setup asked to remove the already installed driver (also 1.9.11). I clicked “OK”, and the proces appearently worked - uninstalling 1.9.11 and reinstalling 1.9.11.
Then I tried to uninstall the driver in Control Panel. I got this message:
which means “This action is only valid for products, that are installed at the moment”
So the pc recognizes the driver as being not present, but still I can see it in Control Panel, and cannot uninstall it.