I would also like the source code to be released. People are using a 10yr old version. You can say that there is a beta version but only people going on these forums know about it therefore 99.99% of users are using the old stable version.
By the time a new stable version is released optical drives won't be included on any laptops any longer, they aren't included in many nowadays. Seems a waste to keep the program in beta, what is the point in that exactly?