No, if you opened a Clipchamp account using a particular email address (or your Google or Facebook social login), it is not possible to change the login email address that is connected to this account. If you signed up to one of our paid plans, the subscription is connected to the email address you used to sign up and can't be changed unfortunately.
You can add multiple login options to the same Clipchamp account as long as they are using the same email address, please see here for the steps involved - https://help.clipchamp.com/hc/en-us/articles/226859187-How-to-sign-up-to-Clipchamp-using-Email-Password. However you can't change the login email address of an account.
What you can also do is add a different billing email address to your Clipchamp account, which is handy if you're signing up to one of our paid plans and would like your accounting department or manager to be listed as the billing contact on subscription statements. You can change the billing email address that is connected to the subscription by going to your user profile and modifying the information in the Billing section, please see https://clipchamp.com/profile.
However the email address to sign in to the account that is connected to the subscription can't be changed.