I activated franchise demo
But I don't know where to change the image on the home page, and also the header color
Please always attach a link to your website so we can check it out. If the page is offline(localhost), then our help will be limited. You will have to contact us when the page is online. Also, please ensure that the page is not under maintenance before you provide us with the link.
It is always a good idea to also attach a screenshot showing what you refer to.