I clicked the icon which removes all Axis bindings and the program crashed. I have no idea why as I have not edited them in a few days and they were working perfectly. No question, just submitting here because the crash reporter also crashed when I clicked submit.
I tried this on a brand new project and it crashes every time for both remove all axis mappings and remove all action mappings. Deleting individual mappings works initially, but the deleted mappings come back when you restart the editor.