It would appear that I am also having this issue, and I can't seem to figure out which email I set up the previous account with. Any help in this regard would be appreciated!
I'm having the same issue as above. I vaguely recall creating a profile here years ago but I've tried all of my old email addresses and none of them have been registered through the site. I would like help to either switch my information to this account or to get help accessing the old account.