I have been using this software for the past few weeks. Suddenly, on a printout where I chose to send the 3d view to a seperate window, it is impossible to revert to having the 3d model back to the default view...under the 2d view.

What is worse is that if I try to close the 3d window, all of the program becomes completely un responsive. All I can do is kill java in the task manager. to close the program, where it will re-open with the 3d view in a different window.