The Unicorns have been hard at work once again, and with improvements to the game come improvements to BMBF.
BMBF 1.4.4 for Beat Saber 1.5.0 is now released.
The Unicorns have heard your request for source code and are currently working on a system for that!
As it is not yet ready for this release, there will not be a source release for this version.
However, expect one in the not-too-distant future. Another post will be made accordingly.