I contacted the developer via their forums for a question I had about the plugin's functionality and he was very courteous, helpful and quick to reply.
I use this plugin to give me complete control over who visits my website and when. I create registered account in the Administrator and give out the username and password to whomever I choose. Then, the plugin takes care of the rest by removing or disabling the account after they have visited. Perfect solution for a website with specific information on it that I only want certain people to access for a certain amount of time.
Thank you Innato B.V.!!