Control Room Monitor Outputs Stopped Working

So I go away for a few days, come back, apply a few windows updates, launch Cubase and my four control room monitor outputs are not working. So, I check all my hardware (assign Cubase ‘stereo out’ to each set of stereo pairs on my converters) and all is well - audio galore. S

Re-assign all the control room outputs to their respective VST connections and still no audio.

Isn’t that a pisser?

Trash preferences… All is well… Who knows why…