As stated previously, here's my remark about lite version: "Thank you for your prompt reply. As I have installed the lite version to test it, I couldn't figure out how to change the newsletter widget in the footer. Indeed, in the footer editing menu, I can only see "reset" option but any possibility to remove and change it. And in the widget menu in Wordpress admin, there's only a "Footer wide" location. Thank you for your advice."
If the premium version has the same structure as the lite version, I would be grateful if you could explain me how to customize the newsletter widget in the footer part.