If the plugin is already installed and you need to link a different Freemius account, do this:
- Go to WP Security Ninja → Account.
- Click Deactivate license in the top right.
You should see a message that the license was deactivated and the site is back on the Free plan.
- On the same page, click Delete Account in the top right.
The local plugin account resets and the license key screen appears again. Paste the license key from the new account.


