I am using DOpus 12.7 (x64) and Windows 10 Fall Creators Update (x64) and two-fingers scrolling isn't smooth at all.
- moving the fingers just a little doesn't scroll at all (as opposed to apps like Chrome where it scrolls just a litte, basically following the fingers' move)
- you have to make bigger and faster moves to have scrolling happen: it then scrolls a lot, like 5-10 lines in a row
It makes it nearly impossible to navigate using the touchpad gestures.
Note: it works with the default Windows explorer.
This may be a more general problem since the same thing happens with native Windows dialogs like the open/save file dialogs.