The original idea was to use the Atmegatron Librarian, but there's major issues with the OSX version (due to Java + Sysex not working). If you've got a PC, that is available on the downloads page. It's also only for Atmegatron, not any other software verisons (e.g. Odytron).
So as an alternative I'm actually working on a new version of Easy Uploader that will allow you to load and save patches! Should be available in a couple of weeks. Let me know if you'd like to beta test it.
Paul