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Information: Send notification when there are two-step verification or connected account changes. This add-ons is base from this suggestion from XenForo Community. Key Features(s): Send Notifications when two-step verification changes Send Notifications when connected account changes Revert...

I've made a lot of customizations to a few addons including some templates of XenForo itself , so, I'm quite concerned when I have to upgrade them. What is the best practice to upgrade Addons and the core XenForo that let me able to easily roll the system back in case that I stuck on something...