How do I unlock my withdrawal address?

Please go to the Settings page.

The first text box that you should see will be the "Change Payout Address" option, enter your 2FA code (or password if 2FA is disabled) into the designated field and click on "unlock address". Your 2FA code is either your Google Authenticator code on your phone or Yubikey.

Please note you will then need to wait 24 hours for your address to unlock, once unlocked just enter the new address you want payouts going to and lock in the new address.