Same here, device is visible for OS and all applications as DVB-T, co for many apps DVB-C this will be an issue.
DVB-C at least on driver 1.40.2303.0 can be locked by DVB-T apps, but it's hard to use it in this way.
Tried to play around in registry and change some settings, but it didn't help either.
It is possible, got other stick with the same VID_0572 and same hardware, but from other vendor and they just made a workaround so stick is detected two times, once as DVB-T, once as DVB-C, only one mode can be used at a time.