Bigbadburts

I've had a butchers around and can't find any information on this. But basically I have the latest version of DayZ, Geforce Experience and Graphics Drivers. I know that recently DayZ could be optimized using Geforce Experience, but it still says "Game cannot be optimized" in the list. I'd rather not have to reinstall DayZ with the download and everything, so was wondering if anyone knew a solution to this problem or any ideas on what would allow me to optimize it? Thanks in advance :)