You can use the account recovery to change your email address. Please perform the following steps.
1. Download the recovery key from your account https://calipio.com/app/account
2. Logout from your Calipio account https://calipio.com/app/auth/sign-out
3. Open your browser in incognito mode
4. Open the link of the calipio_recovery.txt in the incognito browser
5. Enter your NEW email address in the account recovery dialog
6. You will receive an email to the NEW email address. Please confirm it by clicking the button in the email
7. Provide your password on the confirmation page