I have installed all the Handbook files and am now getting multiple errors. This appears to have also broken all third party Pathfinder files I was using, as the Community Pack no longer appears available.
Here's a screencap of the error messages:
https://i.imgur.com/eGpK6jd.jpg
I've also noticed that HeroLab doesn't seem to recognize a lot of sources of "free talents" when I was using just the core Spheres book and Expanded Options - it didn't want to give me the two for making a spherecaster or the extra talents from the human favored class bonus.