Getting to "raw config" on dashboard with no header or menu

So, I’ve been playing with the “custom sidebar” HACS integration. I added the “topmenu: false” option which removed the top menu, but also removed the three dots that let you edit the dashboard. I can’t find anywhere, where I’m able to get back to edit that option to “false”. I’ve looked through the various yaml files etc. Any suggestions of how I can change that parameter back?