Does this mean the trade was a loser after you entered into it? If so, what is your method for determining when to get out of a trade? I noticed one trade 'touched' a stop loss so I'm assuming you lost pips there.
By posting your software you immediately established a copyright as of that date. If the guy made any money, you have legal claim against him. Either way, you should be able to shut him down for violating your copyright.