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The World of Warcraft updating system is a standalone application that automates the task of keeping your add-ons current.
Anyone that has been playing World of Warcraft for any length of time knows how frustrating a new content patch can be. The scripting system in WoW is under constant modification to help add-on writers; unfortunately this does result in add-ons breaking quite often and requires them to be updated - a very time-consuming effort if you have more than a few installed.
WoWus was created to help alleviate the pains of keeping your installation in workable order; please see the Features section for further information.