I'm using Sony Movie Studio 13, the basic version. The last time I opened my project, the windows docking area was bigger, squishing the video preview window over to the right and making it smaller. How do I restore the initial sizes? I can't seem to move the splitter between the two areas, even though the Show Me How tutorial indicates I should be able to. In fact, I can't move any of the splitters. Can anyone help me out?