I have same problem but I use stable version. When I press play it briefly "opens", then coleses faster than blink of the eye and there is a message that Dayz stopped working. Tried to verify intergrity file at steam, tried to put "Disable desktop composition" at compatibility settings, then I removed every single bit of DayZ related files and folders (also run registry cleaner) and of course, tried to install it again. It still crashes. So... Please help! Oh and... I didn't play it more than a month but I updated it...
