Plus is a simple concept: with just your mouse’s buttons either view photos or create a folder into which you can move your favorite photos. All automatically. Select the folder that contains the photos you wish to review. With left clicks, move through your photos. If you come across a photo you want to pick out of the bunch, make a right click and a sub-folder titled “+” will be created in the chosen folder, into which the photo will be moved* . That’s it.
*(Note: this will not be a copy; the original will be moved)