Navigate to and install your NSP(s). [Windows] Instructions For Use (Fluffy.pyw) 1/5) Install TinFoil or Goldleaf on your Switch These steps apply for all custom firmware. This includes but not limited to: Kosmos, ReINX, SXOS, etc. ...
However, when I go to install the said game (which was dumped to NSP format) onto either Internal NAND or MicroSD, the cute fox girl (her name escapes my mind atm) growls at me about Invalid Signature. I then select "Yes, I want a brick" or "Continue" (I forget the exact wording...