If you find that the Customer Hub does not open when you select the Customer Hub button from the Schedule Board, you may need to clear the Customer Hub cache to remove the true/false value from the "is open" flag. If For example, if your browser crashed while the Customer Hub was open, it could still be set to "true" and this is preventing it the Customer Hub tab from opening a second time. Clearing the cache on your machine will allow it to open again.
...