Might sound bad, but your Nintendo 3DS folder is corrupted, to fix it:
1, delete the folder Nintendo 3DS on your root
2, put it in the 3ds and turn on your 3ds
Now it should work, i did it this way and it worked! all your games will be gone however.
So, i wanted to do smth with the "tickets" tab in fbi, deleted every one, and now all my app are gone, and only the card reader is left,
can anyone help me fix this?