Missing Rigify Buttons Tab! I am attempting to rig for the first time, and I wanted to try out the Rigify Add-on. I have looked up many different tutorials, but I cant seem to solve my problem:

I went  to generate my rig, but for some reason, not even the Rigify Buttons tab will show up! Is there anything I can do to fix this? I am also using the latest (2.76) version of Blender, so maybe there's a different and/or easier way now? Please help!!
Rigify is an add on. Install it.
Change the window type to User Preferences as above.
Search or find the Rigify add on.
Check the box next to the little man.
Change the window back to the previous .. perhaps 3D View.
Begin Using.