How to transfer Filmage Screen to a new device?

As for Filmage Screen.dmg:
If you want to unbind your license code to one device and link it to another, please contact to claim your request with your license code and email address. We will unbind it for you.

As for Filmage Screen(Apple Store):
Download Filmage Screen Pro from Apple Store with the same Apple ID in your new device and open it. You don't need to pay for a second time.