Update
User Tab will keep user custom actions

Unzip Biab Chord Picker User Buttons.ahk & Biab Chord Picker User Functions.ahk
keep them in the same folder as Biab Chord Picker xxx.ahk
Edit them in notepad or any text editor, just drag in, edit and save.
When you right click Biab Chord Picker.ahk > Compile, it will create Biab Chord Picker.exe with your custom action buttons.

You need to have AutoHotKey installed to Compile to exe
https://autohotkey.com/download/

For Later version of BB
Exe, script and bb.jpg (to use your custom action you will need to Compile the to exe again).
https://www.dropbox.com/s/69jmqkclcxr8q9x/Biab%20Chord%20Picker%20beta%202.1a.zip?dl=1

Script and bb.jpg only
https://www.dropbox.com/s/bn9lfezeyufgigq/Biab%20Chord%20Picker%20beta%202.1a.ahk.zip?dl=1

For Earlier Biab versions ONLY (if when you right click a chord > Edit, and it's already highlighted then use this version)
Exe, script and bb.jpg (to use your custom action you will need to Compile the to exe again).
https://www.dropbox.com/s/jonfvea6fu0xihn/Biab%20Chord%20Picker%20beta%202.1a%20BB2011.zip?dl=1

Script and bb.jpg only
https://www.dropbox.com/s/9owjj7ehcrjsyo3/Biab%20Chord%20Picker%20beta%202.1a%20BB2011.ahk.zip?dl=0

If I want to create a custom action for Custom Action 1 Button 1

I edit the name in "Biab Chord Picker User Buttons.ahk": Action Name rename > Unfold
Code:
;Custom Actions 1

Gui, Font, S16 CWhite Normal, Arial
Gui, Add, Text, x22 y70 w230 h30 , Custom Actions 1
Gui, Font, S8 CBlack Bold, Arial
Gui, Add, Button, x22 y100 w90 h20 gButtonCA1-1, Action Name


to
Code:
;Custom Actions 1

Gui, Font, S16 CWhite Normal, Arial
Gui, Add, Text, x22 y70 w230 h30 , Custom Actions 1
Gui, Font, S8 CBlack Bold, Arial
Gui, Add, Button, x22 y100 w90 h20 gButtonCA1-1, Unfold


Now I edit the function in Biab Chord Picker User Functions.ahk
Code:
ButtonCA1-1:
winactivate,ahk_class TBandWindow
Send  x
Send  x
Send  x
Return


to
Code:
ButtonCA1-1:
winactivate,ahk_class TBandWindow
Send  !E
Send  {Down 10}
Send  {Right}
Send  {Down 5}
Send {Enter}
Return

!E = Alt+E brings up the Edit menu.
User can upload and share their custom actions.
If you have trouble let me know what action you need.

Send ^ = Ctrl
Send ! = Alt
Send + = Shift
Send # = Win Key
Press the Alt key the shortcuts will show underscores
Send !E will open Edit menu
Use the keys below to access menu items
Send {Enter} enter key
Send {Left} left cursor
Send {Right}
Send {Up}
Send {Down}
Send {Down 3} down 3
Sleep, 100 will slow the keystrokes

Biab Track Injector for Reaper
Free Biab Chord Picker Tool