It is not straightforward to restore editable scene from a bundle, because the bundle includes only optimized assets and these optimizations would need to be reverted to make the scene editable.
Do you have this scene uploaded to your Shapespark account? If so, we can more easily restore it from the uploaded version, because the uploaded version includes also not optimized assets. If you didn’t upload this scene please send us the bundle to support@shapespark.com and we will try to figure out how to restore it.