I am testing this with a multisite installation.
I was hoping it would allow me to make changes to all sites in the multisite network at once. Maybe this plugin is not designed this way?
The documentation said to access it through Settings->White Label CMS (which doesn't exist on the network admin dashboard) and gave no special instructions for a multisite install. I accessed the plugin through Settings->White Label CMS on the main blog (id=1) hoping that all blogs in the network would be affected since some plugins support multisite in this way. However, this did not work.