As I mentioned, I'm working on WIN10 with 2 screens, I'm trying to set up a sliding screen right and left but since I upgraded to version 3.0,
I can not scroll the screens and when I move the screen it immediately returns to normal position.
If you mean changing Fences "Desktop Pages" via keyboard or mouse. First you need to add pages first before the keyboard or mouse switch to work. Need to move, click and drag, at least one of the fence to that desktop page for fence to auto create a new desktop page for it.
If you mean you already have fences on other pages. But you cannot switch between them with your mouse or keyboard, than try the purge and reinstall steps https://forums.stardock.com/486084/fences-support-faq#reinstalling
reboot retest and report back.
Stardock Community Assistant