In other words "Though Luck" and "Don't fool around w. the Insider Program". 
This is quite unwillingly, since I forgot to leave the insider program after I upgraded to W11.
The situation became even weirder, when the taskbar locked it self to the top of the screen after I did a "Restart Explorer" - What a mess !!!
Luckily I have a "Time Machine"
AKA a backup only a few days old and a well tested disaster recovery setup.
So every thing is snug and fine again. Plus I'm out of the insider program again.
Cheers
Tim