Is there a way, in the Articles database, to change the order of comments, so that newer comments appear at the top?

Edit the highlighted template (ideally, edit your own version of the default templates)

 

Find this line:

{{foreach $record->comments( NULL, NULL, 'date', 'asc', NULL, NULL, NULL, NULL, FALSE, isset( \IPS\Request::i()->showDeleted ) ) as $comment}}

Change 'asc' to 'desc' and save.

Thank you!! 😃