There should be an "unstick topic" item in the "manage this thread" menu at the bottom of the topic. <img src="https://www.ubbcentral.com/boards/images/graemlins/smile.gif" alt="" />
OKay, is there an option anywhere in the edit/manage area with the wording "Return to normal date" ? That's the wording for the unsticky function in 6.3.