To FINALLY get to the "update" section there are a couple of intermediary steps. After your step 3, clicking on the "system rigs" link the "eyeglasses" displayed only the "view" heading. But, underneath was a link to "login...." to system rigs. I had to re-login (even though I was already logged in) and THEN it showed my two system rigs and THIS TIME the "eyeglasses" displayed "update rig"... Wooolah...