There seem to be a bug in Google Play Store when purchasing Plus version in PVR Live and possibly other apps as well. This applies to Android TV devices, not sure if regular Android devices are affected.
Here's a workaround:
Open "Settings -> Apps -> Google Play Store". Click "Clean data" and "Clean cache".
If you already purchased PVR Live Plus, the Plus features should be activated the next time you open PVR Live after this procedure.
Great Thanks!