Fxck not working with 10.8.5 !!

it says 10.8 or above, my OS is 10.8.5, not working.

"Check with the developer to make sure KakaoTalk works with this version of OS X. You may need to reinstall the application. Be sure to install any available updates for the application and OS X."

is there any way to downgrade or download previous version? PLZ!!!

Dj Staccato about KakaoTalk