How to activate License for Magento 2 extension?
After purchasing and completing the payment process for the extension on MageHQ, please login and visit My downloadable product
Login -> My Account -> My Downloadable Products -> Please enter your domain to get a license key.

Once you have the license key, please go to your Admin page -> Stores -> Configuration -> Magehq Extensions -> Manage Licenses -> Paste the License Key corresponding to the extension you purchased.
