No, you don’t have to download anything! That's one of the biggest benefits of CG Pro Prints. You can upload everything to our site and we will keep the images from your most recent order for up to 90 days. You can make sizing and layout adjustments in real time on our site, and see a 3D preview of what it will look like before purchase. We maintain everything on the back end so there's no complicated software to worry about downloading and updating, etc. You can create an account or checkout as a guest!