You need to load the TestFlight App in the TV-AppStore. I will send you an email with instructions how to redeem the code in TestFlight App. Then you could install the app like any other app.
Currently have EyeTV software on Mac, EyeTV app on iPad working with HDHomeRun Prime. Have done beta testing via TestFlight App.
If you need feedback/testing on this config in the US, would be glad to help out via TestFlight.