How To Download Images:
Option 1: (To save a full size image) Open a photo within a gallery, right-click on the image, save image as, select desired location and hit save.
Option 2: (To save a full size image) Open a photo within a gallery and click the downward pointing arrow icon at the bottom right of the image.
Option 3: (To save your choice of sizes) Open a photo within a gallery; click the icon with three squares at the bottom right of the image; click on the correct size you need; click, hold and drag the image to your desktop.