Before deleting files, users are encouraged to ensure a copy is saved on their desktop or anywhere outside of Lumin.
Unfortunately, when a file is deleted, there isn't currently a way for a user to recover it. Therefore, before deleting any documents in your Circle, users are encouraged to ensure that a copy is saved on their desktop or in any other cloud storage such as Google Drive that is outside of Lumin.
TIP: Need to restore your document's original version? Find out how you can do it here.