Setting number of Chef licenses

We recently purchased licenses for more Chef nodes, but so far I haven’t been able to install them. According to https://docs.chef.io/config_rb_server_optional_settings.html I should be able to set

license[‘nodes’] = x

in chef-server.rb, and run chef-server-ctl reconfigure, but that doesn’t seem to do anything.

What’s the right way to add more licenses to our installation?

Dave