The following should fix the issue

1. From the CSDS main menu, select 'System | Upgrade data files from web'.
2. Select 'Square Dance Cue Sheet database' and press the 'Download' button.
3. Upon completion, Restart CSDS.
4. From the CSDS menu, select 'Music | Edit Music Database'.
5. From the Edit Music Database window menu, select 'Tools | Add cue sheets, lyrics, and more'..
6. Upon completion, close the Edit Music Database window, saving changes

See also https://www.ceder.net/helpdb/viewsingle.php?UniqueId=595