To change your password, pull down the dashboard, go to the profile page by clicking on the Profile link (or copy paste this link https://www.expenseregister.com/MyAccount/EditProfileFormPage.php) and enter your new password.
But I wonder if you already did this and did not find a way to save the info... the save button is at the very bottom of the page. I think it might be a good idea to add a save/update button at the top of the page too.
Thanks.