Hello, Amy V,
We use ‘viwec_template’ post type for keeping the Email templates, so you can search for them in your backups.
Also, it will be useful to know that there are also ‘viwec_settings_type’ post_meta and ‘viwec_email_structure’ post meta for each Email template built.
For correct reverting your templates we would recommend you to contact with hosting provider or someone who did it before.
Kind Regards,
8theme team