DL160G5 - Reset ILO to Factory Defaults

Hi all

Trying to reset the ILO on a company's DL160G5 to factory - any idea on how I might achieve this?  I've tried using SmartStart but the current version (8.70b) doesn't seem to want to work, and provides no option for the ILO Configuration.  I can also find absolutely nothing in the ILO or DL160G5 documentation to advise me on the best practice, any ideas?

For what it's worth, it was running FreeNAS.

I've tried downgrading then upgrading (which I've seen a suggestion to do in the past), but the configuration didn't change.

Thanks