This function worked for me when I first installed the plugin, however now it doesn’t seem to after multiple attempts at disabling and re-enabling the WP registration function.
garymarkfuller, I believe the answer to your question lies in a combination of things. If the plugin is working as I suspect it’s intended, you need to enable this in your Facebook application, as well as leave this checkbox clear in the plugin: “Suppress default welcome email:”, in turn the user that registered will put that information in upon confirmation of the account.