how to get back to default workspace view

Trivial question: I clicked on the Master Control in some fashion and lost the default layout for the Audio File workspace. Does anyone know how to get back to the default workspace layout that WL7 presents when it’s first opened?

With WaveLab? One solution: Click on the workspace button to open its menu, then select “Open New Workspace”. From the dialog, choose a Factory preset, usually “Power-user”.
To make this the default, close the old workspace first. Then the new workspace.