yes i've got this problem friend. Glad to hear i'm not alone
Most of the time I see nothing in The Viewport at all, sometimes the model is very far away below, just as you describe.
I carefully set up an attractive scene, only to find the viewport empty as mother hubbards cupboard in the sheet layer.
I have emailed VW tech support in the UK about this. I will let you know if i get a reply.
I have IBM PC 64 BIT- What you runnin'?
Andrew