I see, thank you for the detailed answer. I actually don't have "Update Instruments" on my Spotlight menu, only "Refresh Instruments"
What I'm really trying to figure out is -- I have a certain class set to be the color GREEN, but for some reason it won't show up as green in wireframe view but DOES in other views (top/plan, openGL, etc). Any idea on why that might be? Other classes DO show color in wireframe view so I'm pretty confused.