How can I use the ZIP files?
You'll need to unzip the file(s) you download -- all designs are delivered in compressed 'ZIP' format. You'll need to use an unzipping program to 'unzip' all the designs, PowerPoint templates and presentations contained within the zip archive.
7-Zip is an excellent freeware zip/unzip program for Microsoft Windows - WinZip is a shareware alternative.
Mac users can get StuffIt Expander.