Helma, db4tech:

There is a 4th way to modify your model after importing that works on models that have been imported separately using the function Furniture --> Import furniture. You can recognize these models because in the model list (top-left window) their name is in italics.

Choose the model to modify, right-click it and a window opens that offers 5 options: Copy, Delete, Add to home, Modify furniture and Import furniture. Choose Modify furniture and proceed as in the first method db4tech described.

Hans