I think I found a solution to your problem.
I was having the same issues, and uninstalling Asus Smart Gesture from the control panel, restarting my computer, and then installing the old windows 8.1 (64-bit in my case) driver seems to work for me now - two finger scrolling and three-finger previous/forward gesturing included.
I found the driver on the 'Asus Smart Gesture support site' by choosing Windows 8.1 instead of Windows 10.
The file .zip is called 'SmartGesture_LinearSetting_FOCAL_64bit_VER228' to be specific. I uploaded it to filedropper.com in case anyone ever needs a mirror.
Hope this works for you!
I can't post links, because I'm new here.
Hopefully you'll be able to decipher these non-links: filedropper . com / smartgesturelinearsettingfocal64bitver228
support.asus . com / Download.aspx?SLanguage=en&m=smart+gesture
(I cross-posted this from a reddit-thread describing the same problem as your. Here's a link to that, in case you want to join the discussion over there: reddit . com /r/ Windows10/comments/3gfb27/after_latest_driver_update_asus_smart_gesture/)