Thank you for getting in touch with us.
We have checked your account and found out that on 10/06/2017 you upgraded from SQLBackupAndFTP Lite version 10 to SQLBackupAndFTP Lite version 11 without one-year Full-Service subscription. It means that you have only one-month Full-Service subscription which expired on 11/06/2017.
Your license never expires and you can use the version you’ve purchased forever. However zero-config email service for sending backup notifications, support, and weblog are parts of the optional Full-Service subscription and requires a yearly recurring fee.
If you do not want to use the subscription, please configure your own email server for sending emails.
Please find more details at: https://sqlbackupandftp.com/blog/full-service-subscription
You can renew your subscription by clicking "Renew subscription".