Select New Part on Buerligons Welcome page and you will enter into part modeling mode.
All basic shapes like boxes, cylinders, cones and spheres are positioned using work coordinate systems. So first create a work coordinate system before adding a basic shape. The workgeometry plugin is the second feature plugin in the Feature toolbar. For adding a basic shape you have to select a work coordinate systems before pressing ok.
Created features are displayed in the feature list on the left hand side.