For future reference, please leave all DLC-related comments to the DLC page, this Itch page is mainly for the base game.
Your problem has also been resolved a few times on the DLC page, but essentially, you'll need to find the "14nightswithyou-paid" folder, then locate and replace it with the "14 Nights With You" folder instead.
If you need further help, feel free to visit the DLC page and I can try to assist you there.