Stan,
Today when I attempted to open the registered version of Development Build, it opened as an unregistered version. For unknown reason it lost the registration data. And there was a message that an exception had occurred. I already reported that exception by email.
But there was also a message that updates were available. I downloaded and installed the updates and the Development Build became 130420, exactly the same as normal build, and it has the same features as the normal build.
During my work with Development Build, the normal build was closed and it remains unaffected by these problems.