With bbosen's help I found and installed an old AH version, and it crashed when I ran the film viewer. I was saddened, and tried a couple of even earlier versions, and they crashed also...
... and then I think I figured out why!
Films I have dating 6 months earlier than the one I want still show P-39 sorties with no problem. However the sortie I filmed immediately before the one I want (ended one film, started another) also crashes the film viewer.
I think it's the MA terrain map that is crashing it, or something. Does anybody have any archived MA terrain files from december 2009 or january 2010 time frame?
I have a partial screenshot of the fields around where the combat took place (clipboard screenshot) but don't recall what map it was. Just that it was in the MA.
Here's the screenshot:

Yes, that's all I have. Unless folks know how to read the inner details of a film file via hex editor or whatever.
EDIT: I have a hunch it might be equinox or ozkansas, but can't be sure. I only have ndisles on this basic install.