When choosing the Alternate Download option a new tab and screen will appear.  Individual photos may be downloaded by clicking on the icon in the lower right corner. You may also click on the 3 over 3 squares just above the gallery in the right corner to change the display to include a check box next to each image. Here you may check the images you want to download or you may check the top most check box to select all images. Once your selection is made, click on the Download button at the top of the file list. If you have any questions or problems please feel free to contact me.