woehful

if i start the gamedirectly from steam it asks me if i want to start off a 64 bit or 32, i have tried both multiple times and still get the same error

so i recently just downloaded this argo game, i already have arma but i wanted to give this a shot, as i try to launch it from the BattleEye launcher it says i needa 64 bit processor when i do have a 64 and 32 bit processor, can anyone help me? is there some kind of software i can download or?