I can't import MXF X-AVC recorded by Sony Z100. Same for 4k CineForm AVIs. HitFilm Pro 2017 just ignores these files when trying to import.
EDIT: Oops, I can't even import simple AVC (rendered by HandBrake, all media 4k).
EDIT 2: Very strange. I did reboot my system twice but I can't import any kind of media into HitFilm 2017 no more.
Looks like this happens since I deinstalled HF Pro 4.