There's nothing Microsoft can do to "solve this". You’ve seen this if you’ve ever owned a Retina iPad or iPhone and you had to 2x scale an app to make it fill the screen, resulting in a slightly-blurry app. At least until the app developers released high-res
versions.
Until whatever company built that program re-builds it using larger icons and visuals, you'll continue seeing the small size. Microsoft can't fix it for them without making it blurry by enlarging it, and you can do that if you want with the scale options,
but Microsoft can't rebuild everyone else's apps for them. If all they have is small graphics and fonts, then they need to update their program just like all the iPhone apps did.