Looks like some code should be added for DPI aware, otherwise MMEX is blurred out on Windows 10 with HighDPI (27" 4K screen at 150%):
https://docs.wxwidgets.org/trunk/overview_high_dpi.html
https://forums.wxwidgets.org/viewtopic.php?f=23&t=46699#p198279

HiDPI now working after adding: '-DwxUSE_DPI_AWARE_MANIFEST=2' when compiling my project's Windows .rc file with Mingw's windres and copying in 'include/wx/msw/amd64_dpi_aware_pmv2.manifest' from wxWidgets distribution to 'include/wx/msw' at wx install prefix location.

Actual:

Change this settings (which should be done automatically by the above suggested changes):

Correct result: