Before you start working with the two applications, you need to make sure that you downloaded a compatible version of Flexi Layouts Pro with the Dreamweaver CC. To open a page and modify it in Flexi Layout, you need to have Dreamweaver opened. From Dreamweaver, from the File menu on the right select the page that you want to modify. After the page is selected, go to the upper zone above the current zone, and press the Create/Edit Layout button. The Flexi Layout program will be automatically opened.