I've only done a Carefree, but I think the process is near the same. You probably have to drill out the rivets that hold one end cap on in order to slide the fabric out of the groove in the roller tube. Then re-rivet or screw the cap back on when finished.
Sorry, but I don't have a step-by-step procedure.
The basics of getting the roller tube on/off are covered in the awning installation manual - see http://184.108.40.206/pdf/3308242.001.pdf
2004 American Tradition; 2014 Buick LaCRosse
Homebase in the Ocala Nat'l Forest near Ocala, FL