Ok, have tried all your suggestions folks, and I appreciate all of them. Nothing helped, P12 wasn't responding where it came to THAT issue. And as I mentioned, ALL renders of any kind regardless of engine used or settings selected this one POST effect was being ran and applied to every render. And it blew out the image with brightness. So, unable to stop that, I did the good ol UNinstall/REinstall of the software. That did the trick, that worked. I can now get renders as expected from both FireFly and SuperFly, I can use POST Effects in SuperFly fine and they only apply as expected for THAT render. I now think my cat Mogwai was the cause of the problem. Well I can't think of anything else! THIS problem is now resolved.
We will be looking forward to PY scripts to be updated along the way. All in good time, and a huge thanks to all who are doing that!

My 66th Birthday PC Build (July 1, 2020) :  named BadMoonRYZEN!, W10Pro x64, Octal Core RYZEN7 X3700 4.05 GHz, 64GB DDR4 RAM, GeForce RTX 3060 - 12GB GDDR6, PP2014, PP 11, P12, PS-CS4 Extended & Vue 2024.

McG.