I just purchased DeCoda as it looked good and the demo version didn't export to see if it exported the chords.
But it only does a few chord types.
You can't export the chords, it should a least export them as midi markers.
You have to manually fill the notes in in the piano roll and moving them has no effect on the audio.

You can do it all and more with the free SonicVisualiser like export the chords.
https://forum.cockos.com/showthread.php?p=2142463#post2142463

But I got in contact with zplane and they are working on improving it.