In Yuki, it is only possible to delete a folder from the bottom shelf in the Archive.

A deleted folder cannot be retrieved in the Archive

When deleting a folder, all documents are moved to the Other folder, (all) tab.

After you have recreated the deleted folder, you can move the documents from the Other folder back to the new folder at once.

At the top of your screen, click the Change folder and tab properties button. In the screen now opened, click the Move button to move all documents at once.

The following screen is opened:

Scroll to the folder to which you want to move the documents and select the relevant folder.

The documents are now moved to this folder.

TIP!

To move only one document, open the document in question and click the Click here to store this document in another folder button. 

Then, in the screen now opened, select the folder to which the document should be moved.