Controls "History inspector" and "Sighting list" not working

Hi all.
I use CT 3.520 and do not know in which version it was still working: The separate control “History inspector” and “Sighting list” (with deactivated “Edit” property) do not work more. But both functions behind “Option” navigator control are working fine.

… may be someone has a hint.

Greetings from Germany
Holger