To change the password you use to log in to your HomeExchange.com account please click on:
Your Account and from the drop-down menu select Account Details. On the resulting page enter a new password in the field saying "password" and repeat the password in the field next to it saying "confirm password". After you've typed and repeated the password don't forget to click on "Save" in the top right corner of the page.
If you are not logged in to your account and have forgotten your password and are unable to log in please follow instructions on how to reset your password here.