[Elecraft] K3: Clearing the ATU memories?

[KM5Q]

I just relocated my shack and extended my window-line feeder to my  
Cobra dipole. It changed the tuning. The ATU has no problem finding  
new combinations to retune on every band. However, I suppose I should  
clear the memories and get a fresh start. Right?

How do I do that? I'm running FW 3.27. I can't find an entry in CONFIG  
to clear the memories.

Thanks
Windy KM5Q
K3 #764