I bought the pro version of this plugin.
I have struggled to set up the SMTP settings as instructions are thin on the ground. Now I have been able to subscribe to my own GWA database (as a test), I find that the plugin refuses to send out emails.
I have sent three help requests via its site at http://freeautoresponder.biz/ but have only got automated responses with 'help' ticket numbers.
I wonder if they are more interested in recruiting affiliates to market and sell the plugin than sell and support a functional piece of software.
My experience with the GWA Autoresponder has not been good so far and at the moment I would not recommend it.