Yes! Our extensions will continue working after your subscription expires. Once expired, you will lose access to new releases, support and the use of our auto-configuration tools.
Yes you can continue using JFBConnect after your subscription is over. The error you're receiving usually comes when you're using Autotune in the background, which is the auto-configuration tool for FB apps that requires a subscription. If you're seeing this error in a different area of JFBConnect, please let me know.
-Melissa