If I download the CD, can my daughter take the CD home with her and then also install it from the same CD?
There wouldn't be any problem if the download possibility was still possible. I've tried to download the software you have mentioned, but no link is provided.
To be able to obtain the software, you would have to visit the following website and get in touch with the developers. They also don't offer any information related to download, operating system support, general system requirements or troubleshooting.
Official page: https://www.rocketlawyer.com/article/the-difference-between-a-living-will-and-durable-power-of-attorney-for-health-care.rl