As far as I know (from following this thread) Seddi (Sven) is no longer active in this forum. There also seems to be no further development of his software Jinx!.
Though this end of development is regrettable, he created a great free software used and appreciated by light enthusiasts all over the world. I've been using his software for a longer time and didn't face any bugs or problems.
I think it should be possible to contact him (a web search could be helpful...) - but I really doubt there is hope for any further versions.