To change your password you need to go to Account section and scroll down to Change password button:
In the following window, you need to type your new password, which must meet the following criteria:
password must be at least 7 characters,
password must contain at least one number,
contain at least one special character: !"@;%?*{}+
Once you type your new password you need to confirm it via entering
SMS code from the attached phone number,
Email code from the attached email,
Note 1: You don't need to remember the old password to set up a new one.
Note 2: Make sure you remember your password.
Note 3: You can use password generator to create complex passwords to assure maximum security of your crypto assets.