ReaTrak will transfer the chords from Biab & Biab Plugin into Reaper.
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Download the file below ReaTrak_ver.47-2.ReaperConfigZip.mp4
and remove the .mp4 from the filename (in Explorer > View check File name extensions)
Now in Reaper menu Options > Preferences > General > Import Configuration

it will most likely open the file browser in REAPER\Configurations folder

you can drag ReaTrak_ver.47.ReaperConfigZip into that window and open it or browse to your download folder for it.
Now click the Import button.

In Reaper menu Actions > Show Action List
now click Import >
it will open the folder REAPER\KeyMaps\
now open ReaTrak Scripts.ReaperKeyMap

now do the same with
Custom Actions Required (Main).ReaperKeyMap

now in that Action window on the right drop down select MIDI Editor
and do the same with
ReaTrak MIDI Editor.ReaperKeyMap

Now go to the menu View > Toolbar Docker
you can now add or change toolbars
right click on the toolbar window > Open toolbar 16
right click the opened toolbar 16 tab > Customize
at the bottom right select Import >
this will open folder REAPER\MenuSets\
now select ReaTrak color icons toolbar 16.ReaperMenu

you can do the same with Toolbar 14 and Toolbar 15 for small or medium buttons.
Make sure you have SWS Extensions installed.
To allow the Toolbar Buttons to scale up/down in size
in Reaper menu Options > Preferences > Appearance > uncheck both "Don't scale toolbar buttons....)

Once you have your song in the Biab Plugin make sure it is Unfolded by clicking the little down arrow in the bottom right of the Plugin window.
Now Save your song in the Plugin then re open it.
Now click the "Biab Plugin Chords" button, ** Note the first time will ask for the "Song.txt" this will be in the bb folder usually C:\bb.
To get the chords from Biab Save As MusicXML and drag and drop into Reaper.
Now click "MusicXML Chords" button.

Remove the .mp4 from file:

this is AWESOME!!!!!!!!!!!!!!!!
thank you so much