I recently finished a residential remodel plan for a client and after pricing out the work he decided to abort and redesign a more budget friendly plan. So I started by going in and changing all walls to be removed to stay, (in the existing floor plan) and I completely eliminated the "new floor plan". Problem is, all the walls that were in the new floor plan are still there in 3d view. Why wouldn't they go away when the new floor plan was eliminated? What is the easiest way to keep the existing floor plan, site, foundation, and start from scratch?