I tried the idea of reinstalling Paint.NET and then giving Revo Uninstaller a crack at ripping it all out with its advanced option. Nnnnggg, Nope! Paint.NET is apparently somehow still existent.
Ehhh, in the process of having reinstalled it, I played around with it for a while. This time around I got further than the previous 2 times I had tried out Paint.NET. On those 2 previous occasions, I got nowhere. I must have been missing some key step back then.
Now I found out that I CAN get Effects Plugins to give it some more Horsepower ... some more Warp Factor Thrust.
I'll look into those Plugins. Who knows? I might yet get some use out of Paint.NET.
Thanks for the suggestions, Pondus ... Aethec!