The users that are logged-in have acces to My Roofs page. On this page you have a list of all roofs you created so far. You can access and update every single roof datas by picking roof ID number.
After you have picked ID number you are redirected to Step 4 page, but you can change data in all 4 steps. Don’t forget to pick the green button AUTO-GENERATE COMPONENTS LIST to update roof components.