If you've set your profile's privacy settings (to hide things such as your contact info from guests/users not logged in), it's unfortunate that I've had to disable this plugin. It's caused a total headache with mass-emails (basically giving an error every time I tried testing the feature out and failing to send emails) and seeing as the plugin was in beta, it's best for me to disable it at least until a more stable version is available.
Sorry for anyone who wanted certain profile details hidden from view of those you choose, I'll be looking at other options. In the meantime, I'd recommend just removing any details from you profile you wouldn't want to be visible to guests.