(since 2.5)
To remove links to posts in titles (by default it is enabled), create/edit component nm-init and insert this (enclosed between <?php and ?> tags):
nm_set_option('titlelink',false);
or
nm_set_option('titlelink',0);
This will be for all news page types. If you want to want to remove the links only in single/full post pages, create/edit component nm-top-single and insert there the code below.