While your subscription is active, you have access to all updates, priority support and use of the automatic configuration tool. Unfortunately, your subscription has expired, so those benefits no longer apply.
JFBConnect will continue to work without running Autotune and most features should work as they did before. You can always configure your Facebook Application manually through the Facebook Developer area.
Also, please note that Facebook (and other social networks) have made some drastic changes over the last 6-12 months. Each release of JFBConnect is updated to comply with those changes. It's possible that some features in your release of JFBConnect may no longer work due to changes in the social networks APIs. We always recommend using the latest release (currently v6.2.4) to make sure everything works as expected.
I hope that helps explain, but if you need anything else, just let us know.
Thanks,
Alex