[Imp]

Okay this is interesting me I assume people that are running 640x480 or 800x600 are doing it in full screen.
I tried them & while things are bigger the detail is terrible.
Windowed all it does is effect the size of the window.

I normally play windowed set to desktop though sometimes use a smaller window so I can keep an eye on other things that are running to the right of it.
Use 1600x900 for desktop as for the life of me I cant see any improvement in picture quality going higher.

The improvement in picture quality easily makes up for the slight reduction in size. Everything is crisp & easy to see without straining your eyes looking at a "fuzzy display"

If you really cant see try 1200 or 1600 rather than 1900 trade size for quality to see what suits you best but it will not be 800 with its poor quality.

I need glasses for everything close up but reading text in MBT is just as easy as anything else like my mobile phone if I have them on. If I don't its all just a blur and the lower resolutions remain blurry with my glasses on.
I would say people that struggle to see need to save their eyes by buying glasses & or the CD version & playing till they get a resolution they like.