.kbn files are just ascii text, so Notepad should do it.
The map and values would have to be reverse engineered, but that's probably not hard to do.
Here's an example section out of "SONAR Default Key Assignments.kbn"
[Track View]
Kx00460B=265
Kx00520B=501
...
[Piano Roll View]
Kx00520B=370
Kx00250B=379
..
[Loop Construction View]
Kx00250B=379
Kx00270B=378
[Staff View]
Kx00520B=370
Kx00250B=482
etc, etc.