UI.X 2 Dark 2.2.15.0.2

[willl]

How to upload UI.X 2 Dark 2.2.15.0.2 into Xenforo Cloud?

You'll want to use the installer with the UI.X 2 addon to simplify it; Just install the addon and go Setup -> Options -> [UI.X] Options. You'll need to create an API key (which you can do here), and put that in, but once you do you can install any styles in your ThemeHouse account under Appearance -> Themehouse Styles.