Hey, this is the guy from the original post. I found a better solution a while back that I should’ve put on that post. It’s a program called Pixelfix. It fills in the unused pixels based on the pixel next to it.
Original post it came from: Pixelfix: Remove the black edges on scaled images
Github link: Release Version 1.0.0 · Corecii/Transparent-Pixel-Fix · GitHub