Unfortunately I don't have the source code of the released version since it was a work in progress.
Strictly speaking you're not allowed to distribute the binaries then. Being beta, alpha or work in progress is no excuse.
As a rule of thumb: When you put some binary of a GPL project online, make snapshot of the source at that point, too. You don't need to include it, as long as you include a written offer for it, and it is available upon request. The source must be available for at least 3 years.
