I am a bit confused at how this was made with reverse engineering. Looking at the files there is a blocks.bin file(with some json files defining segments of the file to read). I am not sure, but this file seems to been extracted from the actual SBtalker program? which I think this is technically Copyright infringement, if it was Direct extraction.
Though, maybe there are some more details on how this was reverse engineered. As I was looking to try and work at the SBtalker program myself until I found this addon and looked at the files.