The first thing you have to do is activate the actions. At the top right you have a button bar that allows you to activate and deactivate file and folder viewing options. Click on Actions.
This view is saved for the next logins and does not need to be repeated each time you access the system.
Once activated, you will see several icons appear below the file you want to download. Click on the Download icon.
You will see a pop-up menu appear. Click on Download High-Res.
Your file is being downloaded to your computer.