Unfortunately, this is a general description of the Trust Manager screen and basically does not change anything in my case. Still after clicking Update now nothing happens. Nevertheless, thanks for help.
The list of trusted identities is stored in the addressbook.acrodata file.
It is located here:
I'm wondering if there is a problem with the file.
It may be corrupt or the location may be read-only.
You might check the permissions.
Acrobat looks for the addressbook.acrodata file at launch time. If it is absent, Acrobat will automatically rebuild it.
You might try moving or renaming the addressbook and launching Acrobat again so it can do so.
Then try to update the AATL.