Presentation corrupted in 1680x1050, 120 DPI

Font used by Portable Apps GUI doesn't seem to be scalable.
The GUI looks namely strange on displays with resolution 1680x1050 WSXGA
with DPI set to 120.
I gues DPI120 is non-standard setting.

Each application position in the main menu is visible partially only.
Half of theirs size.
Font increased with DPI120 but field size of menu positions stay unchanged
for the standard DPI.

I could attach a screenshot to give better feeling of this issue.
But not possible to attach a file here.