Login to M24Pro launcher with your M24Pro account info.
If your login process finished as successfuly then you will see M24Pro Client screen.
Select your languege. Click to "..."(search) button and select game executable("Metin2Client.exe"). If you playing on pvp server then you must select correct executable file usually it have .bin extension.
Click to Play button for start game. (if you play on GF servers than you have to fill mail, id and password. Click to play button for start game).
M24Pro will be ready for use after completed login to game.