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It does what it needs to in association with the hardware (FB Tube). At least, I think it does. Most of the settings are intuitive. Some are not. A better or more complete description of what the setting does needs to be available through the help or online somewhere.
Helicon FB Tube is an extension tube with integrated electronic microcontroller designed to enable automated focus bracketing in single or continuous shooting modes. Mounted on the camera in the same way as a usual macro extension tube, Helicon FB Tube automatically shifts the focus by one step with each shot thus producing a stack of images of unlimited length that can be rendered into a fully-focused image.