Naw, you don't need to buy it twice. Just email me at darkchibishadowdev@gmail.com with your gumroad receipt (or screenshot of the product in your account there) and I will hook you up with a replacement.
Gumroad lied to us during the ban and said everyone would still have access to the banned adult products they bought but turns out, they can't, so I've been replacing a lot of PDFs for folks.