the Audio Engine initialization happens really quickly, just a second or so, after which Dorico hangs with the RSS feed message. Suspecting the Audio Engine I had a look for the VST Audio Engine in Task Manager, and it wasn’t there. Hmm…
So, I switched my default audio from my external Alesis audio mixer to USB audio, and all is now OK.
Conclusion: the VST Audio Engine should be a prime suspect when investigating start up snags on Windows. (in the Billiard Room with the lead piping m’lud)