The pack maker/editor is completely broken

I was making an ender dragon for my friend so I could overlay it on a pack they wanted and the underside of the wing was like default, so I went in the photo editor to edit each individual pixels of the image and it still didn’t work and completely ruined the dragon. Anyways its glitched and I lost my original creation which took like 2 hours to make. Please fix this

Make it in PMCSkin3d