Typically, Plesk add-ons (like Plesk extensions, web apps, and so on) are associated with a Plesk license key. That is why, when you purchase Plesk add-ons at the Plesk online store, you are prompted to enter the number of your license key. Once you purchase a key, you will receive an activation email.

To install an add-on license key:

1. Go to Tools & Settings > License Management > Additional License Keys and click Retrieve Keys.
2. The Plesk’s License Manager will retrieve the upgraded license key from the Plesk licensing server and automatically install it to your Plesk.

If your activation email contains an activation code or a license key file, you should install the key manually.

To install an add-on license key using an activation code:

1. Go to Tools & Settings > License Management > Additional License Keys and click Install Key.
2. Enter the code you received in the email to the Enter an activation code field and click OK.

To install an add-on license key using a license key file:

1. Go to Tools & Settings > License Management > Additional License Keys and click Install Key.
2. Choose Upload a license key file.
3. Specify the path to the key file you received in the email and click OK.