The easiest way to share your project is to use a cloud service such as Dropbox, Box, Google Drive, or Windows One Drive. Using a cloud service is just like having an extra hard drive connected to your computer.
Cloud drives also have options allowing you to share a file or folder. Once you are connected to a cloud service, create a folder, and just save your SiteSpinner project to that folder. Then share that folder with your friend.
I am willing to set up a Dropbox folder and share it with you so you can save your SiteSpinner project. I could then make the changes to your project for you. This would save your friend from having to download & install SiteSpinner and then learning how to use it. If you want to do this, then send me your e-mail address. My e-mail address can be found in my public profile.