When you use the PRO version, you can enable Versions. With this option you can save previous versions of your items and categories.
This way no changes are lost when you saved a change by accident.
You can also set the maximum versions you want to save.
On the right side of the item edit screen you find a Version Note. Here you can leave a small note for the changes you have made to the item.
To Restore a previous version of your item or category, click on the Versions button on top.
A popup will show you the latest saved versions.
Select a version and press the Restore button.
You can also preview, compare or delete a version.
With the Keep on/off button you can keep a version forever.