OK I'm trying ScanTailor Advanced and I see it has some commands for fixing but can't find something like "unyellowing"
EDIT oh wait, I kind of figured it out, but still working on it.
EDIT I downloaded ImageMagik and I can load only one image at the time and it has commands like Transform> Crop, Chop, Flip, Flop...
Can this be done in photoshop on all images at once?
EDIT ok I solved it. I did it in Photoshop by using this tutorial
https://marckean.com/2011/12/18/use-...s-in-a-folder/