For earlier versions of Biab the only thing that needed changing was when you Edit the Chord in 2011 the chord is already highlighted but in 2018 it's not so i just took the highlight line out of the script.

For Earlier Biab versions ONLY:
Exe, script and bb.jpg
https://www.dropbox.com/s/iad33ui9imba8wn/Biab%20Chord%20Picker%20beta%202.0f%20BB2011.zip?dl=1

Script and bb.jpg only
https://www.dropbox.com/s/9z4d5iowpvcs3h5/Biab%20Chord%20Picker%20beta%202.0f%20BB2011.ahk.zip?dl=1