Yeah, it's probably a little bit ouch, but welcome to the world of beta testing.
To create a RAW to MLV convertor would require a bulk of time from a developer to develop the software, which would be used by few, once, to create the files, then be useless.
I can't speak for all developers, but I would resign myself to the fact that those RAW files will no longer receive any support, and look for other solutions to the problem.