UV Mapping With Wings - Pagoda Productions Tutorial

[ssmeier]

Pagoda Productions Tutorial - Step 28 (continued)
At the end of Step 28, my Wings3D v1.5.3 looks very similar to Pagoda's tutorial screen shot.
The following are my notes.

Step 28
Result after Render setting of 2: Draw Faces as recommended by micheus

Note: Outliner window contains the three colored materials (Bottom, Middle and Top), the default material, the sphere1_auv material, and the sphere1_auv texture (auvBG texture is gone).

Save the model as it is currently. (LMB menu File, LMB Save As. The Save dialog opens. In the File name: field, type "pagoda_28.wings". LMB the Save button. The dialog closes.

Note:
If you close Wings3D now, and re-open "pagoda_28.wings" later, here are things to notice.
In the Outliner window, the colored materials (Bottom, Middle and Top) are gone. The Outliner only contains default material, sphere1_auv material and asphere1_auv texture.
LMB menu Window, LBM UV Editor Window results in "Nothing selected" dialog with an OK button.

So my questions are:
Is there a way to save my Wings3D model so I can close Wings3D, and return to the tutorial again at a later time?
Is there a way to save Wings3D so the AutoUV window and its state is not lost?
Do I need to use a menu File entry other than "Save As", like the "Save Unused Materials" entry?

-Steve