Philip,
Not sure what happened there when you say the "components folder disappeared". Obviously, something's not right overall. The utilities.php file was moved back in version 4.2.0 of JFBConnect to the main /libraries/sourcecoast/ folder (from the /components/com_jfbconnect/libraries one). The jfbcsystem plugin was updated to then look for it in the new location. It sounds like you're using the JFBCSystem plugin from v4.0 or v4.1 but the component files are from v4.2.
What you can try is to edit the /plugins/system/jfbcsystem.php file. At the top, you'll see 3 lines like below:
jimport('sourcecoast.openGraph');
jimport('sourcecoast.utilities');
jimport('sourcecoast.easyTags');Simply put a # in front of those 3 lines, which comments them out so they don't execute. That should allow you to access the admin area. Then, we'd highly recommend installing the full JFBConnect component which should fix your file locations and update your JFBCSystem plugin properly. Do not simply unzip the component file into your site structure or else the full installation routing won't work.
If that doesn't work, or you run into other issues, please let us know!
Thanks,
Alex