Downloading the key is useless if you put it in the wrong folder. Citra is very picky about file location.
One of the most common hurdles for new users setting up the Citra 3DS emulator is the infamous "AES Keys" error. You might try to launch a game, only to be greeted by a prompt stating that the emulator is missing necessary keys to decrypt the game files. citra aes keystxt download fix
Usually in .3ds format, requiring system keys to unpack. Downloading the key is useless if you put
Move or paste your aes_keys.txt file directly into this sysdata folder. For Linux Users Open your file manager and enable "Show Hidden Files." You might try to launch a game, only
Press Windows Key + R , type %appdata% , and hit Enter. Look for the Citra folder. Inside, open the sysdata folder. On Linux: Navigate to ~/.local/share/citra-emu/sysdata/ .