Unfortunately, projects are not able to be restored once they have been deleted.
We regularly back up our systems, but we do not keep versioning history for individual projects. This means that if you delete or reset your project, we won't be able to restore it to an earlier point in time. That is why we have warnings that will alert you before a project is deleted or reset. It is your responsibility to ensure that you keep your project active and avoid accidental deletion or reset.
As a way to ensure that you have a backup version of your project, you could consider creating a duplicate of your project by visiting the My Books page and clicking "Duplicate Book":
This helps to ensure that you have a backup copy in case your original copy is deleted or reset. Please note that duplicate projects will also be deleted after a certain period of time. You can see our article on how long we store content for more information
Once you no longer need this duplicate project, please ensure you delete it to make room for other projects.
If you need any further assistance or have questions, please don't hesitate to reach out to our Customer Care team.