In previous versions, when I changed the palette in the config file, and save, it changed immediately. But now it seems that changing the palette that way doesn't works any more.
So now the only way to change the palette is in the sprite editor?
I got the problem, seems default cartridge has DB16 palette and that's why you don't see changes.
So, it shouldn't be, it's a bug. As a temporary solution, load palette.tic from demos, copy any palette string from the code and paste it to the Palette Editor. (also, pls create an issue on the Github)