Update: new location with different HW: Mac mini M1 + EyeTV Sat Free
After upgrade the same problem: No HD stream.
I used the EyeTV Reporter app to uninstall the EyeTV app.
Performed a clean EyeTV installation and setup, but the same bad result 😞
Now I'm back to 15.3.2. I'm out of ideas and the support response = zero 😞
Seems to be that EyeTV is not supported anymore .....