Attached Link: http://www.digitalriver.com/dr/v2/ec_dynamic.main?SP=1&PN=12&sid=52277

Hi Leah, That is a mac product (.sit extension). You can extract the files with no problem using Stuffit expander. You can download a free trial at the link I've provided. If you have any problems, please let me know and I will expand the sit for you so that you can enjoy these beautiful backgrounds! Deb

Debbie M.