I have one monitor besides my laptop screen. If I last opened Quicken on the extra monitor, disconnect the monitor, and open Quicken when the extra monitor is not available then Quicken opens on the monitor that is no longer connected and cannot be used. I have to go home, connect the monitor, and open Quicken, move Quicken to the laptop screen, shut everything down, and go back to where I wanted to use Quicken without the monitor.
Is this a WIndows 10 Pro bug or a Quicken bug? If a Windows bug can Quicken work around it by a way to open on the current screen, i.e. the laptop screen, instead of where it was opened last time?