No, just make sure you have the one that is current as at 5 august, that will be your password (same username, of course), stored somewhere safe for when it goes live, so you can join the party! If you change your steemit password, the new one won't be valid for Calibrae.

By the way, it's kinda cool that you misspelled it calibre. I wouldn't have minded using that as the name but it was impossible to find a domain name like that. The word is pronounced like 'kalibri', exactly how hummingbird is said in russian.