MW is currently very difficult to use on Windows 10 touchscreen (Surface in my case) without a mouse. Tapping the screen or swiping selects multiple lines instead of scrolling. The right side scroll bar is way too small and not adjustable to use effectively with your finger.
Apologies! We will be improving support for touchscreen surfaces for MoneyWiz for Windows in future updates. Currently indeed it might be slightly inconvenient to use without a mouse.