Jumping on this a bit late (2 years!). I’m having the same issue but with Canon XF Utility.
I need to extract focal length info from an MXF file, so converting is not an option. I even tried re-adding the video files to a XF105 pre-formatted card but it seems, without the original INDEX.MIF, I’m out of luck.
The camera doesn’t even allow me to view my old .MXFs.