1. Purchase one or more licenses for the Add-In from your Add-In provider. Once you have paid for a licensed version of the Add-In, you receive (via email or other suitable means) a license key for the product.
2. Save the license key and the latest version of the Add-In. If you have already installed the plugin trial, it will released with the key to a full version.
3. Run the Add-In's setup program to install the Add-In. 4. In Enterprise Architect, select the Help | Register and Manage License Key(s) menu option, or the Add-Ins | Enter License Key for <add-in name=""></add-in>menu option.

5. Click on the Add Key button. The Add Registration Key dialog displays.

6. Copy in the key you received with the Add-In, including the {} characters.

7. Click on the OK button.
8. When the Add-In has been added successfully, close down Enterprise Architect and restart it to apply the changes.

If you have purchased a floating licence (shared key) follow these steps: