To edit the content of a Keynote (Key, Title, Spec or Description), select the Keynote you want to change and edit the fields in Keynote Editing shown below:
Any changes made to the fields are automatically saved to the database. However, if any of the keynotes have already been placed as Labels, you will need to run the Cadimage> Keynotes> Audit Labels… tool to ensure all Labels are updated with the latest data.