Seems to only work on games with smaller filesizes. The Binding of Isaac (1.5 GB) was converted sucessfully, while bigger games stopped after creating an NCA. Also is it normal that the games shrink to like 1/3 of their filesizes? TBOI ended up with 580 MB.
I did the worst mistake anyone could make while playing a Video game, I accidentally deleted my save file. So if someone could dump his completed ,or at least a save over chapter 23 so I can use FEFTwiddler to go back to that Point, i would be grateful.