graceandham gave good advise if you only want to change the password. However the new link would be send to an email that no longer exist. You can send a PM to test with all the information and have the owner change it. Be patient that may take some time or you could just start a new account.
Just went through this struggle. Pretend you have lost your password and request a new link to be sent to your email. Then just change it! I thought the change had to come from the site, but it has to come from you!