2009-11-06 08:55:32 UTC
I fail to see the point of such an option. When you exit and restart VW it will put them all on desktop 1 (apart from the few with an auto assign window rule), so all this option would achieve is starting on an empty desktop most of the time.
To make this option of any real use, VW would need to restore all open windows to their last desktop too - this cannot be done. There was a long thread on this topic a year or so ago - conclusion being use windows Hibernate or Sleep feature.