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From 02 Feb 2016 onwards, NCGlobalLauncher is no longer being used, you will need NCLauncherS from here

REPAIR your game files (NCGlobalLauncher):
NCGlobalLauncher

REPAIR your game files (NC Launcher - NCLauncherS.exe):
NC Launcher - NCLauncherS.exe

Choose the 32bit client (NC Launcher - NCLauncherS.exe):
NC Launcher - NCLauncherS.exe