Plugin does NOT install full functionality

Ok... sorry to start getting a little annoyed but I have been asking for support (which was what is promised on here) about why I can't see this plugin in my admin dashboard on wp. I have a single install. I have downloaded the wpmu dev dashboard and activated the plugin in there... I can see widgets BUT NO PLUGIN TAB on the dashboard!

It's now 2 days that I am trying to get help with this!