Please read the Instructions on how to use the program
But you have the opportunity to buy the full version with advanced features at a discount!
The Mailbox plugin is excellent at extracting addresses from a user’s current email account. So, if you use this plugin, Atomic Email Hunter will scan all the email messages in the mailbox and extract the email addresses from Gmail, Hotmail, or any other mail service. You set the hunting parameters: You can search only in headers or scan email content, too.