Once you make the purchase, you will be given a license id. You’ll enter that license id into your self-hosted FusionAuth under the Reactor menu item. This will activate your license and enable all of the premium features.
If you also purchase an Edition that comes with support, you’ll see a new menu item on your account in the FusionAuth website. This will let you open support tickets or provide you with our support phone number if you have an emergency.