that's an older one.
The TSB3 editing capability has been added into TSBToolSupreme.
Here: https://github.com/BAD-AL/tsbtools/releases/tag/1.3.0.1
If you're having trouble with a certain ROM, ones here should work: https://github.com/BAD-AL/tsbtools/tree/master/TSBProjects/TSBTool/bin/Debug