Have you tested changing the setting below?
This would be under display settings after right clicking in your desktop.
Also, since it is happening in an APP, have you looked for related settings directly in the app?
I look forward to your outcome with this.
Well I did explore many resolution settings, but what's the point of lowering my resolution if I cannot take advantage of my QHD+ display??
These (W10) apps are not the only problem. Other applications (Internet Explorer, Windows dialogs...) also have scaling issues with tiny fonts.
I would say that this is more related to the OS than the graphics driver in the unit.
Actually, I found an article related to this matter, you could check it and test the workaround provided there.
I look forward t your outcome with this.