I'll send you a message, dear, and see if we can locate that e-mail. Once you know what e-mail was signed up to that account, you should be able to go to the "Forgot your Password" function in the yellow box at the top of the website, have an e-mail sent to that address, and from there, fix the issue with your password. If you haven't logged onto this account in a certain amount of time, (over two years) however, it's possible that your account has been automatically removed from the server.
Also, even if you aren't able to access that account, you should still have your map files in your Feral Heart files somewhere, so those should still be pretty safe. c: