Oh crap, forgot they added that in an update after 2.2.4.
So at the end of your hub's IP add :8081 [192.168.x.x:8081] and see if the diagnostic menu appears.
EDIT: Be sure to back up the hub before you do anything just in case you need to revert.
You might also read this thread, specifically look for Gopher's posts starting part way down the page, apparently this worked for others:
