This is a free product with any purchase of UI.X 2 for XenForo 2 with an active license. Use coupon code ClassicDarkFreeUIX2 if you have UI.X 2 and ClassicDarkFreeUIX2Dark if you have UI.X 2 Dark. See UI.X 2 for coupons as well if coming from XenForo 1.
More UI.X Classic Dark Features...