To view the desired pdf in your browser:
"Click" on the desired brochure thumbnail.
To download the desired pdf:
"Right-click" (right button on your mouse) on the desired thumbnail.
A list of options will appear. Go to "save link as" option. Navigate to the desired location on your computer in which you wish to save the file. The easiest option is to save it to your desktop (you can always move it later). This will save the hi-res version of the pdf file to your computer.