I have had to restore a notebook that lost all its data.

[Beatento]

I have had to restore a notebook that lost all its data. However although I've got the data back I can't add to or paste images into existing notes. Nor can I add a new note.

[Petko]

If you open a backup file, you need to save it as an editable notebook first - use the Revert To This Backup button to do it.