6 demo BO, having said that I could not scroll down to bottom of the side menu to obtain the module. This is due to by default the menu won't scroll, in order to't watch the links to the bottom. There's a free module accessible to make the menu scrollable to https://www.presta-addons-modules.com/en/front-office/prestashop-tawkto-multilingual-live-chat-support.html