Home Link on Blogs MU Main Navigation Bar

I just upgraded from BlogsMU 1.2.6 to BlogsMU 1.2.9.

My site is running WordPress 3.2.1 and BuddyPress 1.5.

A “Home” link to my site does not appear in the site’s Main Navigation menu bar.

Also, what file do I need to edit to add another link to the site’s Main Navigation menu bar. A navigation.php file was present in BlogsMU 1.2.6 but it does not appear to be present in BlogsMU 1.2.9.