In order to reactivate Trivia Machine, launch the game, press the Already Paid button from the right corner, enter your name and the serial key in the provided fields and click OK. If you no longer have the game, you can download and install it again from the official web page. If you don't have a serial key, you will need to purchase a new one by pressing the green Buy for PC button. For further information, you can get in touch with the developers using the contact information from the official website.
