I just installed X-Plane Demo Version 11, and my mouse is not visible on screen. Various icons will flicker as I blindly move my mouse at random, but the actual mouse/cursor is missing.
If I connect a second display to my system, the mouse works fine on the second display's DESKTOP (not X-Plane). I get the same behavior when using my system's built-in track pad, an external Bluetooth mouse, or an external USB mouse.
Windows 10 64-bit. HP Spectre X360 laptop (that meets the minimum hardware requirements).