I'm not sure. It depends on your site configuration and many other factors that can be involved, like what other extensions you're using.
We have no record of you having a subscription to JFBConnect, so another question is, where did you get it? There are versions on the web that have been hacked and modified for bad purposes like leaking admin credentials and stealing other user and Facebook information. We can only support our distributions. If you got it from us, please let us know what user account you were subscribed from. If you didn't, there may not be much we can do. You'd need to modify the database to disable or uninstall the extension, but that's well beyond the range of free support, which we normally don't do anyways.
Hope that helps explain,
Alex