Actually this is an old CareFree awning. To change the fabric you basically remove the screws securing the end cap to the roller tube, slide the cap out, then then slide out the old material and slide in the new. There are other issues involving stored torsion spring energy that complicate this job and make it very hazardous to the under informed. Do not under any circumstances underestimate the amount of force stored in the spring that resides in the tube.
I believe I have an old post outlining the steps involved, I will see if I can dig it up.
"One of the best lessons I've learned is that you don't worry about criticism from people you wouldn't seek advice from."
William C. Swinney