Manu03 here the solution .
1 - download citra for windows actualize load a rom whit mii funktion and create a new mii launch game and save .
2 on the detect this directory C:\Users\YOUR USER NAME\AppData\Roaming\Citra
3 - to the desktop save this folders nand+sysdata+config+cdmc
4 - open folder recalbox/saves/3ds/citra and replace that files there .
and have funn .
if its playable not sure not tested yet , in few minuts i can config .
EDIT - mario kart 7 ist working great, you have right you got a black screen for 10 or 15 seconds and after game boots. if you press A button on back screen you can ear some menus sounds .