For licensing key issues, you can open a support ticket at https://shop.falconplayer.com/tickets/ You can also ask questions in the FPP forum at https://falconchristmas.com/forum/index.php?board=8.0 or on Facebook, but if an issue requires investigation on the web site or signing API, you will need to reach out to us directly via a ticket. Please check the HOWTO Guides at https://shop.falconplayer.com/category/howto/ as well to make sure you are following all the instructions. If you find any issues with the provided instructions, please contact us and let us know.