License keys are in the purchase receipt, from
firstname.lastname@example.org, that was emailed to you after payment receipt.
Additionally, you can visit purchase history to login and then click on "View Details and Downloads" for your license keys and downloading again of your purchases.
If you purchased through a guest account, then you'll need to convert to a real account via https://store.techbrise.com/convert-guest-account-to-real/ for download access.
Where does the license key Go?
Step 1: Log in to your WordPress admin and navigate to License page from Companies → License
Step 2: Enter the license key in the box
Step 3: Click on the Save Changes button
Step 4: Once you save the changes it will enable “Activate License“ button.
Step 5: Click on the Activate License button to activate the license on your site.
If you need to deactivate the website licensing to use the license key elsewhere; do as per the screenshot below.