As you install C8, it asks if you want to automatically find runtimes.  Once you go through that set up, at the bottom of your screen you'll see tabs for timelines and such.  I think you know where to go to find your shader tabs, your content tabs, ect.  At the far right there is a small pop-up menu that you can activate by clicking on the arrow (I think it's an arrow?).  I add additional runtimes (I have several now-I've organized my content into groups) so that each one shows.

I'm not sure if this makes sense, I'm half dead at the moment (mentally-:P) but that's the way I usually work it.  If it's not there after the initial set-up scan for content, I go and PUT it there.