Hi Kevin,
Thanks for getting in touch. You can think of your purchase as like a magazine subscription–each purchase grants one year of service, meaning support and updates. At the end of the year, you will lose your access to our support forums and any new updates of the plugin. However, the plugin itself will keep working. (The sole exception to this rule is our Event Aggregator plugin, which relies on our own cloud-based servers for performing import tasks.) If you should choose to renew your license, you’ll get another year of access at our discounted renewal rate. Does that clear things up?
I hope that helps! If you should have any other questions or if I can do anything else to assist, please let me know. Thanks again!