If Luminar 4 doesn't show up in my Skylum Account, please note that the “My Software” section displays the apps that have already been activated. You can create the Skylum account with your Google, Facebook, Microsoft, Apple account, or with your email (used for purchase) and password.
Once you activate Luminar 4 with your email, the app will appear in your Skylum account. If you faced any issues, press App isn't showing? button on top.