Hi, I notice you haven’t yet activated your license.
Once your Exoplanet Pro license is activated, you will be able to see when an update is available in the themes area of your dashboard.
The update works in a similar way to themes which are available from wordpress.org but instead of the update coming from wordpress.org it is updated from our server.
To activate your license go to Dashboard > Appearance > Theme License, click Activate License and save.
or in your account here at UXL Themes, under the Purchases heading, click on View Licenses, then click on Manage Sites and you can add the URLs of your sites there.