As of now, the primary way to change the email address linked to your Webroot account is to get a new keycode and create a new account. But, if you want to keep your current email address as the primary address, you can add a new user to your account. There are two main methods to do this.
If you want to add a user to your existing Webroot account, remember that the email address you used to create your account will still be present. You will add a new user and a new email address with which you can access your account and see the information of linked devices without altering the previous information.
If you want to change your primary email address, you need to obtain a new keycode and re-create an account. In this method, you can take the help of the Webroot team. However, this step will delete all the data that is stored on the My Account site.
If you use this method, you should save your data manually before creating a new account. If you are using the Backup & Sync option, go to the Backup section to get the instructions on downloading data. On the other hand, if you use the Password Manager option, log in to LastPass to get instructions to export the passwords you may have saved.