After you buy Pro or Agency, you get an email with your licence key and a download link for the plugin.
Install the add-on
- Make sure the free ShadowSync SEO plugin is installed and active.
- Go to Plugins → Add New Plugin → Upload Plugin.
- Upload the ShadowSync SEO Pro zip, then click Activate Plugin.
If the free plugin is missing, Pro shows a notice asking you to install it and does nothing else.
Activate your licence
- Go to ShadowSync SEO → Licence.
- Paste your key and click Activate Licence.
You will see PRO ACTIVE, your plan and the licence expiry date.
Move a licence to another site
Click Deactivate Licence on the old site, then activate the key on the new one. A Pro licence covers one site; an Agency licence covers as many as you manage. If a key has reached its limit, activation says so.
If a licence lapses
The licence is checked once a week. When it is no longer valid, the site goes back to the free plugin, which keeps working. Titles and descriptions the AI already wrote stay on your pages.