Well, I found a “solution”. The only way I can get this lesson to work is to completely remove ALL files in my community folder. I’ll have to go through each and every addon to determine the culprit.
The majority of my addons are from the Marketplace, with others from Orbx, PMDG, Flightsim.to etc., but they all indicate they are compatible with the latest update.
So, basically the last update has put my system into a complete ■■■■■ situation…