so i'm on mop and i just re-downloaded the game after a while and when i try to login it says i must login with my battle.net account and i remember doing this last year but i can't remember what did i have to do i think it's connected with being on mop 5.4.8. but how do i change that and to what do i change that i'm also guessing it's that since it says that today is jan 13 2014 XD so yeah pls help