Extract the zip into any folder. No installer is needed.

Open Prime-Yitian2.exe and log in with your Primetin2 username and password.

Do not open Metin2.exe: it is the old updater of 2004 and looks for a server that no longer exists.

The SHA-256 of the zip is shown next to the download: compare it if you want to be sure your copy is ours.