Probably you have already tried, but try doing a fresh YANBF install and converting a new CIA again. Also update the Twilight Menu and bootstrap to the latest version.
I'm not sure if I understood correctly. I was wondering if I can have a backup just copying the files like the OP asked.
Currently I have the NAND backup, games and saves individually.
Wow, thank you so much! I really appreciate your effort! 🤩
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I don't know how to add on GitHub, but I'm sending in the attachment a few more:
Zoo Keeper
Planet Puzzle League
The Simpsons Game
Kirby Squeak Squad
Kirby Mass Attack