When the official servers shut down, dedicated programmers and fans of the franchise utilized leaked source codes, server emulators (like Pangya Debug server builds), and localized language files to keep the game alive. The "Thai Edition" refers to a specific client version that contains the official Thai localization (including the iconic voice acting, item text, and character menus).
Because HackShield is defunct, the game will freeze on the loading screen. To fix this:
Click the "System DSN" tab, then click "Add".