Hi, thanks for your interest.
No, definitively my Paint.NET does not load any palette, nor the saved palettes and neither the default palettte.
I can "save palettes", I can "open the palettes folder", but the buttons to load palettes, do not work at all. whatever I chick there, the colors selection in my palette swatch remains.
By the way, I tried right now in another computer and the trouble replicates there...I am using v3.5.10.