The BMLT first rolled off the assembly line on June 25, 2009.
There are multiple projects that make up the BMLT. Each has its own README and full release history. You can see every release that has ever been made of the BMLT, including before June 25, 2009.
Since 2009, the BMLT has undergone dozens and dozens of minor releases, and one major revision.
The BMLT was designed as a framework and a platform. It has been designed to be extended, and has an enormous number of “hooks.”
So far, no one (including us) has ever actually taken full advantage of the BMLT. There’s still a lot more that can be done with it.