Since I updated to Big Sur 11.2.2 UE4 does not load my projects

I was running really well on a MacBook Pro M1 till I updated this morning to the above.
Now I cannot open any of the 4.26 projects that I was working on for a music video, well not anymore.
Very frustrating that this was not tested prior to release.
4.25 projects do not work either.
It seems that Rosetta 2 (Intel emulator) is not giving any processing power to the starting Unreal Editor, it tries to start then just drops off.
When I first tried the M1 it was screaming along for what I needed, around 72fps better than my trashcan at 8.
I was getting things done at breakneck speed, now this.

I hope either Epic or Apple can solve this kinda quickly so I can get back to work.

Cheers

Chris H.