wow that's strange.. what version of windows are you using?
if you reboot the computer is the effect the same?
Oh! I just remembered something..
if you go to the Display Options tab, at the bottom you will see "Tweaks" box,
can you try experimenting with "Max Size for Large Icon Display"
and see if that has any effect?
you probably have to exit and restart FARR to see the effect of any change.