The statement about how it works is totally confusing to me, but I found that if I started the program, it would list my monitors, and then below that, (with Wallpapers selected), it would show the jpeg images in my Pictures Folder. I could then click on one of the monitors, double click on an image, then click on the three dots showing on that monitor image, and choose how I wanted the wallpaper to be displayed (zoom, fit, center, etc), then click on the green Apply button TWICE. The second time would bring up a choice of desktop or locked screen. Choosing desktop assigns that image to that monitor. I then proceeded to the next monitor and repeated the process.. then quit. Took me a bit to make my three monitors display the three backgrounds (wallpapers) I wanted but when it did I found it worth the effort. One thing to remember is that if you have an image you want to use, it MUST be saved as .jpg in your Pictures directory!