Apple Magic Mouse in Windows 8.1

Out of the box, pairing the magic mouse via bluetooth with the Windows 8.1 box works.
But scrolling by touch is missing.

So:

• Download both Mouse Driver Installer and Mouse Utility Setup from http://trackpadmagic.com/magic-mouse/download
• Run the Installer -> atencíon: the installer will download the 303 MB (!) Bootcamp 3.3
• installer automatically extracts the magic mouse driver from the bootcamp exe 
• Run the Setup -> will launch a GUI config utility also showing the battery status for the magic mouse
• Pair magic mouse with Windows box via bluetooth (if paired previously, de-pair and re-pair)