I am getting a fatal crash error message 'Include file z\ace\addons\main\script_mod.hpp not found.' when opening Arma 3 from the launcher. This is then followed by 'The exception unknown software exception (0x0000dead) occurred in the application at location 0x00007FF8E5A39E08' and then generates a fault report (see attached).
I used to use mods but I have unsubscribed/deleted all mods and my profile folder so it is no longer referencing any save files that might have used these in the past.
I have uninstalled and reinstalled Arma 3 in Steam and verified the integrity of game files once this has been done. Again, no mods have been installed. I have tried this on the stable and development builds of the program, each one getting the same error.
Arma used to run fine when I was using the integrated graphics but I have recently installed a graphics card. Searching the fault tracker site showed no fixes and only one suggestion about downgrading the nVidia driver (currently on 381.89): I have downgraded to previous versions but keep getting the same crash, making Arma completely unplayable.