At first launch I remapped all my keys to the way I prefer them. I played the game for 2 hours or so, saved. Next launch, picked the save game and it loads, but none of the keys are mapped my way, all have reverted back to the defaults.
Most games have a text file, so in looking thru the forums, found: "Change any key in-game options -> C:\Users\<User Name>\Documents\My Games\Far Cry 5\hidinputremapper.xml created.
2. Open hidinputremapper.xml and write this"
The next problem is I don't have file, or that folder anywhere to be found on my drives. I don't know if it is due to the my documents folder being mapped to a D drive, but other games don't care. I have the My Games folder, but no Far Cry 5 folder.