Install
Drag and Drop the AUVN .mzp installer onto your 3ds Max viewport or run it via Menu|MAXScript|Run Script... and click Install.
MacroScript
You can assign a "Hotkey" or a Menu Item to open Adv. UV Normalizer.
To access it go to Customize->Customize User Interface... in 3ds Max menu bar, and under "Category" select AUVN as shown in the image bellow.
Uninstall
To uninstall Adv. UV Normalizer, simply Drag and Drop the AUVN .mzp installer onto your 3ds Max viewport or run it via Menu|MAXScript|Run Script... and click Uninstall.