Well, Im not going to get rid of my mac, i love it and you cant just change your computer but all your programs too. That is a big thing. And thank you Dan for your advice but I already work that way, I think - if "use only the Open/Save command from the OS menu" is the same as not clicking on the bryce scene file but opening it via Bryce open command. The only cure for me is to bring the problematic files in to Bryce 5 but all the stuff to play with is within 5.5.