Hi A.J.
Thanks for taking the time to detail those methods. Everything you suggested works but deleting the ini file is probably the easiest to do in a pinch.
One slight snag with the Windows+Left/ Windows+Right method is that my extended desktop is above the laptop screen. Windows+Down minimises the window so that method isn’t available for extended desktops above or below the main screen.
Otherwise, spot-on and thanks!
Alex.