Periodically, new versions of UberMenu will be released. These may include bug fixes or enhancements, and you may or may not wish to upgrade.
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Upgrading from 1.1.x to 2.x 0
UberMenu 2.0 is a complete rewrite of UberMenu, and not all settings and customizations will be 100% backwards compatible. If you wish to upgrade, you should test to make sure UberMenu 2.0 will work as you desire before deploying it on a production site.
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