It should be easy, you only have to right click on image in Windows Explorer and select print. It’s really easy however you can’t change anything.
You can do it in another way. Start priPrinter and drag image from any folder to priPrinter window. Main window will display paper with image on it. Now you can change margins with mouse drag in order to adjust image on paper. Of course you may drag image to on the paper, crop, duplicate, whatever.
Finally hit print button and print image…
If you want to print image with exact size, you can use measure tool.