Dude you have to do two things. First is to learn more about computers. Secondly, both of you have to let go. This is crazy and what will sueing her do? To eliminate the problem eliminate her access. Good Luck
I believe the statute of limitations should have run out on something like that, long ago.
Its called stalking if you have proof...
I think you need to get the hell over it you have been divorced 12 or 13 years???? Get over it move on that is way to long to still be thinking on it