WoWus (World of Warcraft Updating System) helps you keep up-to-date with the latest add-ons by scanning your add-ons folder and displaying any relevant updates that are required. You can choose which updates to apply and WoWus will then download and install them for you - all with the click of a button. It also has add-on management features and back-up support for updated add-ons.

Fixed: Exception when selecting Add-On Information for a certain add-on
Fixed: Exception at startup when trying to save settings
Fixed: Hopefully fixed a rare "Type Initializer" exception
Fixed: The NTLWorld mirror didn't always work correctly
Other: Only one copy of WoWus can be run at a time
Other: Minor interface improvements
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