This second beta version should bring some additional fixes for bugs that prevented to display the 3D view in the main window when it was saved as detached on a second screen.
I tested it successfully under Mac OS X 10.6 with Java 6 and Mac OS X 10.7 with 7, but it would be nice if users with multiple screens could confirm it works for them too. Tests should be made on files where the 3D view is hidden and with a detached 3D view displayed on other screens.