A question from a "newbie" mac user, so please be gentle! I purchased Quicktime Pro and see not much difference between the Pro version and the freeware version. Am I missing a step somewhere? Primary question: I open up Quicktime, and go to the File menu and select "Open File". After that occurs, I see some files/downloads I want to get rid of. How??? The "Delete: key is greyed out..nothing seems to work. Help!