It's an early version of the program, yes all it does is swap out palettes right now, but you can save and load palettes. I found it useful compared to some of the palette editing in certain image programs. It's good when I have a lot of armors and need to swap out colours to make different variations for online RPGs I do.
A list of features I've recommended for future releases include:
-Being able to select "sections" of the palette and isolate them to swap out with other palettes (for complicated objects)
-With the isolating, being able to load a palette into that exact isolation instead of it applying to the whole image.
-Batch palette swapping
-Greyscale + overlay map
Paint Shop Pro 9 had an excellent way for saving and loading palettes onto an image, but newer updates to video drivers and OS made it basically unusable for me.
Swatchy was basically made to replicate that for me, since I don't like the way other programs do it.
Just figured some others might be interested, if not oh wells