Stefano
Great Plugin, thanks for sharing and wasnt you was Me lol
doesnt have to be a main page, so I made it a sub page, just to keep it off the menu as we already have the widget which is perfect .
so after I made the sub page off the about page, and to keep the confirmation pages in the template, you also NEED to add to Newsletter dedicated page, under “Subscription Steps” the page you created, in my case was,
http://www.MyDomain.com/about/newsletter/.
wanted to share this so the question will be answered for others, this is a great plugin and well worth the time and effort to install, get to know and USE
Thanks for your reply, hope this helps others too