Is it bad to update a job application after the due date?
It's not "bad" to update your application after the deadline, but based on all the committees I've been on, the odds are low that your revised version will be looked at. What most of us do is download the full set of applications shortly after the deadline, and then start to read them. We don't go back and look to see if the applications have changed, and even if we wanted to spend time doing this, I don't think it would be fair to all applicants. (And please don't email that your application has changed, unless it's something amazingly important, like your recent Nobel prize!) All that said, it won't hurt anything to update your application, but your time is likely better spent doing other things.