Folder Painter v1.2 trying to change left side icons

Windows 10 home

When I open the windows explorer I would like to see my own selected icons but I don't know how to use this program dose anyone know how to use it that can explain to me how to change the folder icons for he left side please.

I have all the folder in a folder called folders and I have all the icons in a folder called icons.

Any help would be greatly appreciated thank you.

Select folder then right click choose propertes then customize and you can set them there