How could I miss this button *facepalm*
I will sure make a use of that, no more Colorama pain. Dithering wonders aside, I always wished there would be an option to load palettes from disk to Colorama and colorising composition without "aliasing" mid-tones between each color in palette (as Colorama does, without some crazy tricks). With PixDither loading custom palette + pattern set as 'threshold', this is exactly what I wanted for years :) I already tried it and it works perfectly.
Thanks for such quick reply & being so helpful, Wunkolo!