To un-zip files click on the Un-Zip all files link on the left hand side. Once clicked, a Windows dialogue box will appear telling you that all files in the Zip will be placed in the folder of your choice. You can either un-zip all files to the location of the zip file (i.e. If the Zip file is on your Desktop and you choose this option, then the un-zipped files will also be stored on your Desktop.) Or you can choose another folder to un-zip your files to. If you choose this option, another Windows box will appear and let you browse your computer. Then click "Un-Zip".

You can also click on the blue "Un-Zip" button at the top.