I finally got my installation to work and to my surprise and disappointment, there is no longer an option to use the Steinberg Houston as a control surface for Cubase. (I connect via Midi, not USB) My Houston is old but built like a tank (by Spirit/Soundcraft) and it has been working amazingly well all the way up to Cubase Pro 10.5.20. Why delete this functionality now? I guess it would work just fine keeping the same implementation software-wise as in the previous versions?
If there is someone out there still using the Houston, maybe there is a simple way to make it work that I don’t know about?