I usually don't write reviews, but after struggling with my new Win 10 computer, 4k, and Logitech mouse, I thought others should know that this app worked for me. Tried the Logitech Smooth Scrolling app, latest version, and it made browsing either slow (middle wheel one line) or way too fast (three lines at a time). There was no middle ground. Tried this app and liked it so much, I contributed the $1.99 without hesitation. Live saver for me.