Strange,
I am having no trouble importing the file that you provided for us to to test with (the tracking shot outside the fort — 003805).
However, I DID see the problem you describe (mostly green screen with a small frame of the image in the corner) with an in-house build of M100 while we were working out the problem. Perhaps your install of M100 is in some sort of limbo between v1.0 and 1.0.1?
I’ll run another test and report back soon.
~Wick