There are two ways of resetting the password depending on the circumstances.
You will need to enter your email address in order to receive instructions for the password reset.
Simply changing the password?
If you would like to change your password for any reason, you can do that directly from your general details, by clicking on "My details" (navigation bar --> top right corner --> the last icon):
In your details, you will need to enter the NEW password twice and click "Save" to store your new password.