I'd like to first say this emulator is absolutely incredible, thanks to all who made this possible!
Now on to my problem: I decided to make my own 3dn file for Akumajo Dracula (the cart version, the one with the difficulty selection). I don't know if the Castlevania one publicly available would have worked or not, I was doing it for fun really (I'm that kid that would spend hours messing with the colors while playing with the Super GameBoy).
Today I had a friend come over and wanted to show him the difference when playing the game with no customized 3dn, so I took the 3dn file out of its directory and showed him the game without it (I made no modifications nor did I save a new 3dn).
I then shut down the emulator and put the 3dn file back in the proper directory, booted the game up... and it still was like there was no 3dn file at all.
I immediately shut it down again, made a copy and tried several things, such as editing a couple things and saving (overwriting) the 3dn file (making it go from 8mb to 400kb) to then copy and paste the back up to overwrite the changed file. I tried creating an all new 3dn file and replace that with the back up.
No luck, my old 3dn that I put so much effort into (played through the whole game twice to make sure there were no unresolved issues) simply will not be loaded/recognized.
Can anyone help me out? Or should I just accept that, somehow, I unwittingly flushed hours of work down the drain?