MPDCenter

[Michael Horvath]

Hmm,
it seems that you need to find a IT specialist that meet your requirements.
I am out now on this topic.

I'm sorry, but making old versions available to users who need them is standard *best practice* with everyone else. Unless you are Apple or Microsoft who don't do this. But you most likely already have a disclaimer (there is one in the GPL I think) that protects you from culpability if there is an issue in most cases.