To change your password or the PIN code, you first click on "More" from your "Dashboard" menu:
Then click on Settings:
1. Password change: click on the pencil icon next to the password:
Type in your new password and then type it again to confirm it, submit that by clicking on Change password:
2. PIN code change: click on the pencil icon next to the Change PIN code:
Type in your new PIN code and then type it again to confirm it, submit that by clicking on Save:
Well DONE! Your PASSWORD/PIN has been successfully changed.