Yeesh! That's a new bug to us. The cause is that there's another extension (it looks like PayPlans) that is loading a form with the same name as JFBConnect, and that's causing our config page to show the 'other' forum. Fortunately, it's a pretty easy fix, and we'll be implementing this in the upcoming v5.2.1 release.
To fix, for now, can you please edit the /administrator/components/com_jfbconnect/includes/views.php file. There's 2 updates to make:
Around line 59, you'll see:
$form = JForm::getInstance($name, $formPath, $options);
Please update that to:
$form = JForm::getInstance('com_jfbconnect_' . $name, $formPath, $options);
Then, around line 99, you'll see:
echo '<legend>' . JText::_('COM_JFBCONNECT_' . strtoupper($form->getName()) . '_MENU_' . strtoupper($fieldset->name)) . "</legend>\n";
Remove the 'COM_JFBCONNECT_' . portion from that, so it looks like:
echo '<legend>' . JText::_(strtoupper($form->getName()) . '_MENU_' . strtoupper($fieldset->name)) . "</legend>\n";
That should make everything work as expected.
Please let me know how it goes, and sorry for the trouble.
Thanks,
Alex