To get automatic updates for your add–on, you'll need to activate your license using a valid license key. You can find your license key on your purchase receipt and Account page in the License keys section.
Once you've copied your license key, log back into your theme's admin dashboard and navigate to Plugins ➝ [add–on-name]. Paste your license key into the input field of the License key box, and click Save Changes. Click the Activate License button that appears within the box to activate your license key.
To avoid errors when trying to activate your license key, always click Save Changes before clicking Activate License.
Thats it! You'll now receive a notice with a 1–click install link in your dashboard whenever an update is available. You can also use your license key to submit support tickets.