(updated my question to make it clear my code was posted at FileExchange by some community member).
FileExchange has an app by a community person that is pretty much all my code taken from my site. Someone took all my code and GUI and repackaged it as a matlab app. I knew this was my code when I had one look at the GUI. I Downloaded the source code, and it was mine. They took my name out and renamed the files, and they now claim they published it under their name.
I wrote this myself for a school project. Who to contact at mathworks for this? I have my name on the code which means I am the owner. The app is at FileExchange site, under the apps menu.