Version 4 of TorJump is out and can be found here.
This version contains the tor domain hadcoded into it. That way you don't need to trust me to distribute the correct download link via dropbox. If I try, by altering the dynamically changing download link in my dropbox, to make you download something outside the https://www.torproject.org domain, TorJump will refuse to do so. Great, isn't it? :-)
The source code can be found here.