I have been working on a DVD menu in DVD Studio Pro. Every time I quit the project and open it up again it gives me the message that the document could not be opened. I have version 4.1.2. I have Snow Leopard 10.6.6. I have tried using DiskWarrior and reinstalling DVD Studio Pro. I have tried deleting the preferences but for some reasons when I go to harddrive then to Library, then to preferences there is no DVD studio pro preferences. The menu is pretty complex is includes Play, Producer's notes, Chapters, and Crew. Crew has 9 different menus. If there is anybody that knows how to fix this problem please reply. I don't want to do just do it all in one sitting which takes 3 hours. Thank you.