From what I understand, you want to give the normal version of a project for free (as you do already) and sell an extra “uncensored” version for money.

There are multiple ways to do that. You can set a custom price for the “uncensored” version’s file when uploading it, so people can only access it if they’ve paid that amount in total on your project.

You can also make a separate project page for it, and have that paid, but that adds yet one more thing to maintain.