I lost my saves

Tonight I was playing Halo Wars 2, had just finished The Archive for the first time and the game crashed. When it came back up, all of my saves were gone (and I had a full list) and so were my Phoenix Logs related to Operation SPEARBREAKER and Awakening the Nightmare. And I had so far collected ALL but the ones for the Manifestation level which I have yet to play. While my missions all remain unlocked, the Theater for the last two scenes of the regular Campaign featuring Anders on the new Halo ring have also disappeared though the two scenes I unlocked after that for the beginning of ATN remain unlocked. Is there anyway to recover my lost saves???