after unzipping the dlc, you should see a folder named 14nightswithyou-(free/paid). inside should be another named 14nightswithyou. all you need to do is move that into the game folder of the base game, and it should read properly once you start it up!
certain credit card companies are restricting the purchases of 18+ content, which is why the option no longer works. you can still make a purchase through paypal, though!
