It is a badly written rubbish. It only lets you access pictures that you have in folders that have been given access in preferences/image analysis settings. Then they only show up in calendar on the side bar and not in the original folder. It is not the whole idea of these programs to be user friendly, with drag and drop and no messing about over-complicated stuff.
This software is glitchy and slow. Having repeated problems on Mac with past work failing to load and no longer being able to select all layouts from the menu. Great idea but poorly done. Problems with Windows 8 as well. Perhaps this program is due for an update