Change your password. No need to risk him seeing that title. You want to get your ducks in a row, without tipping your hand that you're starting to think about fighting for your fair share.
Your lawyer should be able to give you an idea of what's reasonable in your state. Always start by asking for more, so you have room to negotiate, but also have an understanding of what would likely be awarded if you went to court - the goal being to stay out of court, of course.
