Files can be downloaded by clicking on the download icon in the thumbnail.
On Google Chrome, look above at the far right of the search bar for a pop up icon and select 'always allow':
On MozillaFirefox, look above at the yellow preference bar and select 'allow':
On Safari, click on Safari --> Preferences --> Privacy and then select 'Allow current website only':
For all other Internet browsers, you will have to undergo a similar process to allow zip folders to be downloaded.
Prior to download, if you would to to crop or resize the image or download in a different file type, you may access Advanced Options:
If images are not downloading, make sure to enable Pop-ups on your browser.