how do u downgrade COH with out having to play with the lastest verson???
It's not fun, but you have to uninstall, reinstall, then most importantly of all you have to make absolutely sure that the game can't auto-update or you're going to end up right back at the latest patch version.
You can prevent the auto update by going into your internet firewall and blocking RelicCOH.exe from access to the internet.
Another more "brute force" approach is to disconnect the internet all together, and that works, but is a bit less elegant.
Once you've reinstalled and prevented any auto-updates, then you can manually patch up to whatever version you like by downloading the individual patches from places like www.gamershell.com for instance.