Renaming a .DBC-resident table using the "Name" entry field of the "Table" page tab of the Table Designer appears to do the job but does not.

On doing so the table name appears as the new name in the Project Manager window, but when subsequently modifying the table's structure the old original name is shown in the MODI STRU window title.

It was necessary to rt-click on the table name in the Project Manager display, then click Rename, then do the rename, in order for the MODI STRU to show the correct table name.