Hi danb,
I have a similar issue as dVs1 on my new 14" laptop, 2880 x 1800 pixels, aspect ratio 16:10. Been using it for a while on my previous laptop and appreciate your effort!
Welcome to MT Mr. Coffee . Thank you for the screenshots, this should fix the issue but I cannot verify the fix since I do not have any computers or monitors where I have this issue. So please try this version and let me know how it goes, thank you!