Update labs is when you click , you only see update lab if you are working on older version. but in case you want to grab a fresh copy, then either rename the assignment copy you worked on or delete it from file==>Open section. if you delete the file, you notice a 404 error on the browser, then click again, reboot the lab, and get a fresh copy.
, you only see update lab if you are working on older version. but in case you want to grab a fresh copy, then either rename the assignment copy you worked on or delete it from file==>Open section. if you delete the file, you notice a 404 error on the browser, then click