Hi there!
Thanks for getting in touch! You’re correct that WooCommerce Tickets is no longer being updated, so you don’t need to renew licensing for both products. If you haven’t set up and used Event Tickets Plus before, we do provide a guide on making the move from WooCommerce Tickets–once you’ve completed these steps, you can simply deactivate and remove the WooCommerce Tickets plugin from your site.
I apologize for the inconvenience regarding where to direct invoice question, but we do appreciate your feedback! I’ve gone ahead and passed your comments along to the site team for consideration. 🙂
I hope that helps! Thanks again–let us know if there’s anything else we can do to assist!