i have wii u 5.5.1, and i missed up my vwii it is not loafding just black screen, my fault of course because of my stupidity, i did not setup bootmii but i have the nand.bin and key.bin, is there any way to use the wii u to restore those files back to the wii u,please forgive my stupidity because i am one,thank you for your time and effort ,greetings