Forum Sub menu vanished....
 

Haven't done anything to my forum since I last upgraded to patch level 2 4.2.0, today I decided to install the dbtech username change plugin as I was bored changing folks usernames.

The author tells me that the plugin does not change anything within the navbar, which it doesn't so for me to install this and see my sub navigation menu vanish is pretty strange.

I disabled the plugin with no success, I then added define('DISABLE_HOOKS', true); to my config.php file again with no success, is there any possible explanation as to why my sub navigation menu has vanished without me doing anything but installing this modification?

The sub nav works within blogs and other modules and plugins however not on the forumhome index, which has never been changed on my default theme so I cannot even revert the template.