Advanced Capstone hdb reset

During the advanced certification I have set .z.w incorrectly, to something that I believe always returns false so any time I try connect to the hdb I am returned an 'access error, is there a way for me to hard reset the hdb to default?

This may help https://community.kx.com/t5/KX-Academy/Kx-Developer/m-p/14316/highlight/true#M243