Create a list of folders you want hidden by dragging them from the folder listing at the right of the screen over to the list of Magic Folders. You only need do this once. To exit with the folders hidden simple click on the "Exit with Magic Folders Invisible" button at the bottom of the screen. To exit with the folders visible click on the "Exit with Magic Folders Visible" button. If you exit with the folders visible you can quickly hide them again by clicking on the "Hide Folders" icon on the taskbar or by running Magic Folders again and clicking on "Cancel".