We are aware of an issue players are experiencing in which their Nexon Launcher may become stuck while updating their MapleStory installation. We are working to resolve this issue as quickly as we can. If you experience an issue where your MapleStory update appears to be stuck, please exit the Nexon Launcher and restart it to resume your update. If the issue persists after multiple restarts, please uninstall MapleStory and re-install it from the launcher. If after these steps, you are still experiencing issues downloading or updating MapleStory, please send a support ticket here.
We apologize for the inconvenience this issue has caused.
-The MapleStory Team