Right now I always get the eShop's:
"Error Code: 022-2634" on my EmuNAND.
But I've heard that if I copy the Nintendo 3ds folder to my computer, format the emuNAND, relink the emuNAND with my NNID, then use emuNANDTool to inject my emuNAND backup to the micro SD, and then copy the old 3ds folder to my 3ds..... That I should finally have access to the eShop.
My problem with that is, when you format an emuNAND, do the keys change so you can't restore your old emuNAND.bin backup to it?