To open the .zip folders downloaded from our store, in most operating systems all you need to do is to double-click on the .zip folder once it is on your desktop or hard drive.
In fact, some operating systems will automatically unzip the folder for you once download is complete. If not, then double-clicking on it will usually do, or right-clicking and choosing the unzip/extract option. Once the .zip folder has been unzipped (or "extracted"), you will find a new folder in the same location with the same name, containing the files you have purchased.
If the double-click or right-click solution does not work, then PC users can also get hold of a free trial of Winzip, a program that will unzip the folders for you. This is available here: http://www.winzip.com/