Our office upgraded to AutoCAD 2008 a few months ago from CAD 2004. Everyone is now using 2008, but we still have 2004 installed. Normally when you open CAD and close it, the next time you open a dwg from explorer it should open in the version you opened last. This is not happening for this user. Every time he opens a drawing from email or explorer it opens in 2004 even though he only uses 2008. Is there a setting somewhere in windows or CAD that can fix this?