Photoboof will run in demo mode until you install the key. The demo is completely full featured, but it overlays the word "demo" on each picture. You can buy a license here, or if you need your serial number re-emailed to you, click Help -> About -> Activate from Photoboof.
Instructions: download the program, install, then read the help file to get started. Email if you have any questions or problems. If you have trouble setting things up we'll gladly log into your computer remotely to get everything set up for you.
Attention Windows 7/8/10 users: if you're using a Canon Powershot and having trouble connecting to your camera, please set Photoboof to run as administrator (right-click the file c:\photoboof7\photoboof7.exe and choose Properties, then Compatibility, and set "run as administrator").