Click on the Green button under question 2 in the plugin and follow the steps (make sure that you have the email-icon selected under question 1). If you are not using an email icon, but use a subscription form, there is also a link to start the claiming process where you defined the layout of the subscription form (last question in the plugin).
Once you claimed your feed, log into your follow.it account and go to “My Offered Feeds” where you will see your feed. There is a link to the statistics as well as an option to download your subscriber’s emails.