Default [Q] Odin crashes while trying to flash stock rom

Hi everyone.Im trying to flash stock ROM on Samsung Galaxy Ace but Odin keeps crashing.What i do is open Odin Multi Downloader v4.42,select OPS file and when i try to navigate to one package file(firmware) a window pops up saying: Odin has stopped working.Im trying to follow this video https://www.youtube.com/watch?v=dMVP2IDk2sU .Im doing this to solve this problem:http://forum.xda-developers.com/show...php?p=51286375 ,so if you have seen this answer there if you can.Thanks!