Thanks for sharing and for the idea and the code.

For the record, to save you time generating exports, managing licenses, expirations and customers, the marketplace solution is IMO the best solution.

In addition to providing you with an ultra-secure licensing system (and integrated in ProRealTime), with an automatic process, the marketplace also allows you to generate trials, manage subscriptions with recurring payments, automatic update management for all your customers, a support ticket tool, etc.
I can help you in the process of putting your shop online, contact me directly: market@prorealcode.com or visit https://market.prorealcode.com and register as a seller 🙂