Hi Pingu,
Although I've never tried "Restore Settings...," scrolling has been working for me for over one week, which has never been the case before. It first seemed to start working approximately two days before my upgrade to Windows 10 on 29 Jul 2015. Perhaps one of the firmware updates that Microsoft released for the Surface Pro 3 fixed the problem.
Perhaps there was a bug in the Bluetooth driver that Microsoft finally found and fixed, but there's no way to tell. The lack of communication from Microsoft about this is frustrating, and I suspect that it has cost them a great deal of money in customer support and mouse replacements that didn't solve the problem anyway.
I'd be curious to hear if anyone has used their Arc Touch Mouse, Surface Edition with a non-Surface device, and if so, if they've experienced the scrolling problem. It would be interesting to know if the scrolling problem was specific to Surface devices, or a problem with Windows 8.1 across the board.
If others have experienced a resolution to the scrolling problem after upgrading to Windows 10, or continued to experience the problem, please let us know your experience.
Thanks,
Steve