You may receive an error message of “The plugin does not have a valid header.” on activation if using the Plugin Installer. The plugin will function normally if activated from the Plugins List.
After activation, you will be redirected to the plugin licence page. An admin notice will also appear:
The licence page can be accessed via 3 methods:
Log into your account or check your email for your licence key. Enter the licence key as shown below, then click Save Changes, then click Activate Licence.