OK this i s sereious
this "blank group" the settings group is still there but the actual settings have been deleted, the groupsettings are also possibly still there a s well.
You will need to put your board into debug mode to fix the problem either
1) delete the settingsgroup and start from scratch.
2) If you have (or can build) a settings .xml for the missing group ... download the current settings .xml add the new setting in the downloaded file then upload the new edited file with the added group.
I had 2 groups of settings dissapear when i upgraded to gold, i lost the jukebox and members choice settings, i used the second method to fix the problem .....