miniDSP SHD Volumio Not Connecting - Factory Reset

Hello, I am no longer able to access Volumio via my miniDSP SHD unit. The sent me a link to do a factory reset using a thumb drive –

The link no longer works so I am trying to find out if another link could be sent that would allow me to do a factory reset via my SHD. Any guidance would be greatly appreciated!

Thank you,