The font size is too big and the icons too small
The font size is too big and icons too small and can not be scaled.
Select with the right mouse button the hydrosym icon on your desktop and choose properties.
Select in the pop-up window the Compatibilty TAB and then Change high DPI settings.
Mark the Overide high DPI scaling behavior.
Make sure that System (Enhanced) is selected and press OK.
Select OK and restart Hydrosym if open.
The problem can appear after an update of Hydrosym or changing your monitor.