Hi Did you ever resolve this issue of emails not being sent??
I have exactly the same issue with the latest version of the free version. I have tested the setup on various clean installs of wordpress and I never get emails delivered to the person who creates the booking.
At first I thought it was my email server blocking the booking emails, but as far as I can see this doesn't seem to the the case.
I know that wordpress is sending emails because I have tested with other plugins and testing by registering an account.
This is a great plugin which I have used for the last three years without any problems. So maybe its my setup, but I don't think it can be, which only leaves the plugin
Any help with this would be amazing