I used to have Elemnet 2 and 4 open but not used at the same time because I don't like the Elements viewer/database. I've now moved from E5 to E6 and actually find E6 faster! Got 3 megafingles of RAM though. The Elements databse still loses and missplaces files though as it has done, for me, since E3. And I do move files using Elements and not Windows Explorer. I do like the editing side of Elements but I just wish they'd let me decide what to do with my files as in 2, rant, rant, rant.