Hi theuberk,
I've found a solution to your problem.
I had the same problem when exporting the file that you sent and noted that the blank areas were displaying the object's base color, so I managed to narrow things down to the material by applying it to an unmodified cube, which had the same problem. Then I tried using individual materials, which exported correctly. This led me to the conclusion that the Multi/Sub-Object material was the problem.
Eventually I discovered that if I typed something in for the name of a sub-material (see attached pictures) then that particular sub-material started working correctly when exported.
On another note, vizard cannot handle separate opacity maps, and instead uses whatever is in the alpha channel of the diffuse texture. Since the max file is basically making the windows 50% transparent, for your convenience I've attached modified versions of the glass textures that have been changed to take that into account. The last attached image (opacity note.jpg) shows the changes.
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