I had trouble uninstalling Asus Smart Gesture using my control panel; it literally would tell me it couldn’t find the file and wouldn’t uninstall it. This was a problem because the new version of Asus Smart Gesture that I downloaded didn’t allow me to update until I removed the old version.
So I used this troubleshooter to uninstall the old version of Smart Gesture: https://support.microsoft.com/en-us/help/17588/windows-fix-problems-that-block-programs-being-installed-or-removed
And then just found the newest version of Smart Gesture and reinstalled it. It made me reset my computer, but voila, I can now scroll using my trackpad!