The issue is started after I uptaded DayZ for experimental. When I tried to open the game, my whole config was reset and screen resolution went to like 600x400 which made it unplayable. Now each time I open the game, settings reset and whether I change them or no, I can't connect to any server beacuse BattleEye doesnt work.(window with agreement pops up and I press Agree each time but I only get the message: "BattleEye initialization failed")
I tried to:
-reinstall the game
-download BattleEye client from off-site
-make config files "Read-Only"
-verifying game cache
-installing DXSETUP from inside the game

Even after I changed back to stable version and with official 0.49 update too, issue occured.
Please, help.