Same thing is happening to me. The emulator and all 3dn files are in the 3dn folder for the emulator. But when I hit load and navigate to the folder. None of the 3dn files show up at all. Act's like nothing is there. Is this just a problem with windows 10, or latest update is bugged?
The idea is amazing to me and really want to use it as i just downloaded it but a turn off as I cant get anything to load or even show up in the first place to be able to load....