I pulled and built the latest pixelshift branch yesterday and the motioncorrection preview looked great for my Pentax K3 II files if careful to switch back and forth between images to get rid of the colour shifts across the whole image.
When exporting jpg's however I end up with a pink version of the green motion preview pattern. This is not visible in the preview.
I fully understand I'm messing with software in motion but I see you managed to get images out of the program. Is the pink patterns something you see as well or a bug I should investigate?