After you buy Soccer Engine on portal.w4dev.com, you get an email with your licence key and a Download Plugin link. The same link is under My Account → Licenses on the portal. Download the zip, then:
- Log in to your WordPress site.
- Go to Plugins → Add New Plugin and click Upload Plugin.
- Choose the
soccer-enginezip file and click Install Now. - Click Activate Plugin.
Then enter your licence key so the plugin gets updates.