If your paid plan expires and you choose not to renew it, you can continue using the plugin without any interruption. It's important to note that once the paid plan expires, all the advanced features included in the PRO version will still be available. You will still have access to all the functionalities offered by the plugin, allowing you to synchronize WooCommerce customer data with your autoresponder. You would need to renew your paid plan to regain access to important updates, bug fixes, new versions, and support. We recommend staying updated with the latest version to benefit from the full range of features and enhancements.