Currently you can't change the email you are registered with because all data to the account is bound to the email.
In case you have a problem accessing your account, you can reset your password: http://support.swipesapp.com/hc/en-us/articles/202444761-How-do-I-change-my-password-
If you want to close down the current account bound to a certain email and open a new one, just email us at firstname.lastname@example.org with the email you are registered with and a request to delete it. We'll close down the account and you can start fresh with a new email registration. NB: We can't transfer the data from the old account to the new one!