>>994
No apology necessary. The MUGEN developers redistributable had no source but showed multiple libre licenses and no mention of the "Mugen license" so I came to the conclusion that Mugen is just freeware that depends on libre libraries.
Paintown is BSD using "an implementation of M.U.G.E.N", and reviewing the source I cannot find the mugen freeware included. I assume they are either using a different engine, relicensed code or perhaps an earlier version of mugen was under a different license.
With regard to EF-12, I couldn't find any source code or a license neither on their site nor in the release. A quick web search only mentioned "freeware."
I will be happy to correct any mistake made on my part. Again no need for apology, it was a quality post but just didn't belong here.
Have a nice day.