Hi,

Do you have 32bit version installed on your Mac, it runs on my Hi Sierra 10.13.26

look for Band-in-a-Box-32bit.app, if you can run it,

AudioChordWizard will only work if you click icon middle of your screen (tool icons) if you open AudioChordWizard from menubar, it won't work, or crash in a moment

Life could be strange when apps are 128bit wink

best regards
ismo