So, I know how late to the party I am, but I acquired some development software for my 3ds. The included .cia's seem to be bad, both DevMenu and FBI's latest version (2.2.6 as of writing) tells me they're broken, and running them through @d0k3 's Decrypt9 tells me they can't be processed. Now, they also came with .CSU files, which I believe can be converted to .CIA files. Can someone please explain to me how to do this without linking to an outdated guide? Decrypt9 decrypts the .CSU files just fine and [this thread](https://gbatemp.net/threads/tutoria...le-sdk-tools-onto-your-3ds-w-pictures.396807/) seems outdated since it never mentions they can be decrypted.