O0o, Thanks for the replies. It's nothing important I was just wondering because I keep seeing the two different colors.

Oh yeah, on this website,
http://sketchup.google.com/gsu6/download.html

is that the link to download SU6 Pro for free?

I've been poking around here lately, and have come to a road block. What I want to know is why when I select a component sometimes the "outline" around the component is sometimes yellow or blue?

Thanks for the help.