How to add purchase verifier for Regular & Extended License?

You will need to have a website or server in order to set up a script to verify purchase codes. Assuming you have that, then I have a guide here on the forums that may help you if you’re using PHP:

Then, have the app communicate with your website or server from the app to perform the purchase code verification. Do keep in mind that any of your buyers can easily remove this check from your app.