Well, I did figure it out. I had to explicitly give permission to non-logged in visitors to the home page or the other three public pages. This wasn’t really intuitive. Plus, the plugin blocked the whole site until I made this adjustment.
I expected the plugin to simply block access to the members page and child pages. Once I created a for-everyone-else rule the site worked. This has little impact on a small site like my current one, but on a larger site it would quickly become unwieldy.
The dialog that helps one restrict access is confusing when you trying to un-restrict access. Further, it looks like I need a different rule for each public page to allow for bookmarks. Someone going to a public page other than the Home Page will either be redirected to the home page, or sent to a particular URL. Again, this will quickly become unwieldy as the site grows.
It would be great to have a rule or check-box that anything not intended to be protected would be visible by default with no need to redirect.