How to hard reset Kano?

I have a Kano computer kit post Feb 2016. It has a Rasberry Pi 3.
I ran an OS upgrade through command line and post upgrade, it restarts and now ask for a password for the account which i don’t remember. Is there a way to hard reset to factory settings and start the upgrade all over again? Clicking on Shift button during restart didn’t bring any other menu up.

HI @rfong

You may need to do a clean install of the SD card, using a Windows, or Mac machine.

Please check out this guide: