For those of you complaining about it not working:
Make sure you type the command correctly. You first need to extract the key from your save file, something like this:
3DSaveTool -f savefile.sav key.bin
This command looks through savefile.sav for the XOR key, and saves it to key.bin. This key.bin file is necessary to actually decrypt and encrypt in the next step. After getting key.bin, do something like this:
3DSaveTool -x savefile.sav decryptedsave.sav key.bin
This runs through savefile.sav using key.bin and decrypts it using Crediar's XOR algorithm. It then saves the decrypted file to decryptedsave.sav which should now be in plain text and easily edited with a hex editor. This command will work in reverse to re-encrypt the save file, as well, doing something like this:
3DSaveTool -x decryptedsave.sav encryptedsave.sav key.bin
Make sure you type the command correctly. You first need to extract the key from your save file, something like this:
3DSaveTool -f savefile.sav key.bin
This command looks through savefile.sav for the XOR key, and saves it to key.bin. This key.bin file is necessary to actually decrypt and encrypt in the next step. After getting key.bin, do something like this:
3DSaveTool -x savefile.sav decryptedsave.sav key.bin
This runs through savefile.sav using key.bin and decrypts it using Crediar's XOR algorithm. It then saves the decrypted file to decryptedsave.sav which should now be in plain text and easily edited with a hex editor. This command will work in reverse to re-encrypt the save file, as well, doing something like this:
3DSaveTool -x decryptedsave.sav encryptedsave.sav key.bin