MConnect Problem

MControl HD on iPad.

All worked well until I connected to and played Qobuz music to Vitus amp using Airplay.

Now, Vitus integrated amp does not show up as a Play To entry under Devices- as it once did, though it is present on the Airplay list- so it is on the same network. I did refresh Devices with the circle/arrow.

How do I get Vitus to display as a Device again, so I can use Qobuz within the app?

Is Airplay of lesser quality than using the app or is it the same connection?

Thx