Hello @Tommy-_
thanks for sharing your problem,
Once you have the SII_Decrypt in your profile to use the codes, you must drag the Game folder to the SII_Decrypt,
Then I will leave you some images where you will see how it should come out:
https://i.postimg.cc/PrGnxjyX/Screenshot-1.png
https://i.postimg.cc/59sFdsSS/Screenshot-2.png
Anyway, I'll leave you the link where you can download the SII_Decrypt again in case it still doesn't work:
https://sharemods.com/h6pozzt4ti8h/SII_Decrypt.rar.html
I hope I can help you with your problem,
Greetings,
AldoTruck.