If you purchased before the 4th of March 2019 or you paid via bank transfer, reach us directly via firstname.lastname@example.org with your key request. Make sure you add the app IDs, the platforms (iOS, Android, Windows), the email address to which we should associate your key and your invoice number.
If your license was purchased or renewed via the Wikitude online store after the 4th of March 2019, you have access to generating the license key by yourself on the Key Generator page. You will need to log in with the email address you used for your purchase (or, if you changed it to a different email address post-purchase, with that respective email address).
See detailed steps on how to generate a commercial license key in the Key Generator page here.
If you have any concerns, please contact us via email@example.com.