Alan,
I'm not sure what you mean. All of those features are still fully supported by us, work on our demo site, and no other users have reported such issues. Some features like the Live Stream plugin have had issues in the past, but we don't hear about them immediately because they aren't as widely used. However, the Fan box, activity feed, comments, and everything else are *widely* used on almost all sites. Without hearing about it from anyone else, that seems to indicate the problem is local to you or your site for some reason.
Can you post or private message a URL with a page that isn't working? Can you tell us 'what' isn't working (blank area, error message, etc)? Can you try going to FB's config page and see if it works there? If not, it's not JFBConnect or Facebook, it's definitely something on your end causing issues:
developers.facebook.com/docs/plugins/
Finally, yes, your subscription has ended. We'll still help you understand, where we can, what may be wrong. However, you are also (likely) at least a version or two out of date on JFBConnect. There are no fixes in the 4.2.3 or 4.2.4 release that relate to those modules though, so I'm not even recommending upgrading for those issues. There are plenty of other fixes and improvements in the most recent point-releases though that may be helpful for your site(s). For the full changelog, see:
www.sourcecoast.com/jfbconnect/docs/changelog
Thanks,
Alex