You can easily revert any task in our Bulk Image Edit app to it's pre-edit state, as long as it's still backed up - 30 days or more depending on the plan. The maximum is 360 days for the Enterprise plan. For more information, please visit the Plans and Pricing page inside the app.
Reverting a task simply re-uploads the before images of that task. If you edit an image with multiple tasks and want to undo them all, simply revert the first task.
To revert, simply open One-Time Tasks from the app's menu and click on the revert button associated with that task.