As part of the signing up process you choose your own password. If you forget that password, a new one has to be added to your account. Your old password can not be recovered, but it can be reset.

All you need to do is go to the password reset page, enter your email address and click on the reset password button. A computer generated password will be sent to your email account. You should now be able to access your account.

You may edit your password using the edit password tab (top left) when you login to your account. Make a note of your new password, and keep it in a safe place.