OK, I believe you're referring to the Construct that started with Poser 11. I don't like it either, so what I did was go to Runtime > Libraries > Scene > Poser 11 Environments and chose Poser 10 Workspace.

Then follow Y-Phil's 3 step method of setting up your "preferred scene". Be sure to close Poser, and then open it again. What you should see when you open Poser is the plain flat Ground Plane that older versions of Poser always had. If you follow Y-Phil's instructions, that's also what you'll see if you start a "new" scene. It's also how I initially set it up for Poser 11, as I much prefer it to the Construct.

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OK . . . Where's my chocolate?

Butterfly Dezignz