Connect to an ESC (direct connect via USB serial port in my case)
Check either "3D mode" or "Reversed" checkboxes: the rest of the settings disappear. Checking both checkboxes show the settings.
Work around: check 3D mode, "Save", "Disconnect", "Connect" - the settings are shown and the checkbox is checked
It appears the panel that contains these checkboxes can toggle the visibility of the panel that contains all other settings, and the checkbox click event propagates to the panel when the checkbox is clicked.
Connect to an ESC (direct connect via USB serial port in my case) Check either "3D mode" or "Reversed" checkboxes: the rest of the settings disappear. Checking both checkboxes show the settings.
Work around: check 3D mode, "Save", "Disconnect", "Connect" - the settings are shown and the checkbox is checked