I have set up the pro version to split each of 2 43'' monitors (3840 x 2160, Samsung UA43K6000K) into 4 x 1920 x 1080 (2 nVidia Geforce GTX 660, all drivers updated) . DisplayFusion properly shows the preview and breaks up the wallpaper into 4 segments but I cannot figure out why the screen resolution isn't changing - it stays at 3840 x 2160.

One of the two monitors shows some contents in the smaller (e. g. 1920) resolution while other windows remain in 3840 mode - that is, until I click any of the 1920 content which then "blows up" to 3840. I've attached a screenshot (it's a financial charting software) for illustration purposes.

Has anyone ran into a similar problem? Thanks for any hints.

Edit: Problem solved, my own stupidity was in the way.