How do I establish my Fluther account on a new computer?

This is LostInParadise. I got a new computer and am not able to log in, so I created a new account so I could ask for advice. I forgot my user name/password. When I gave my email address to get them back, I got a message saying that the email account was not set up on the computer, but I was able to connect to my email account. What do I have to do to be able to return?