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Please try this test version: https://drive.google.com/file/d/0BxMZ8X ... sp=sharing

Yes, as I already wrote the D80 does not have that function.

To be honest don't know as Nikon does not release documentation for budget models.
Maybe someone with D3300 can confirm this.

There is no such property that can be get from camera.

I was already thinking about exchanging the shutter/aperture/iso for the movie mode on Nikon models that support it.
You can change the grid mode in the 'Camera properties display'
While the camera is in live view mode the host mode can't be disabled.

D80 does not have the BULB mode while connected with USB.
Only the new Nikon models including and after D7100 have this feature.

Latest is 21: https://drive.google.com/file/d/0BxMZ8X ... sp=sharing

Just to correct myself it will be set to 'Floating average' +/-10% depending on direction (sunrise/sunset)

Yes

Not sure if the log could help with this but here is a debug build: https://drive.google.com/file/d/0BxMZ8X ... sp=sharing
It will generate a qdd_<date_time>.log file in your Documents folder.

I think the problem is with OpenGL but not sure why.