Hi, I turned on my nintendo letterbox this morning, only to recieve a "Could not repair the letter management file. Please press "HOME button" to return to the HOME menu" I have tried going to home, closing the app and going back on the app, but this did not work. I also tried turning off the 3DS and going back on the app and this did not work either. Did anyone else recieve this error message? I would want to keep all the stationery I bought and things I've unlocked if I can, if not, I guess I will have to do it. Thanks!