News configuration files on Netscape Navigator

Netscape Navigator keeps a list of the news servers it knows about in a
file named "NewsFAT".  If you want to get your copy of Netscape
Navigator to "forget about" a news server (so that the news server no
longer shows up in the list of available servers for you to connect to),
then find the "NewsFAT" file on your system and edit it with a text
editor to remove the line which mentions the news server that you want
to get rid of.
A list of the newsgroups that you're currently subscribed to, along with
what articles you've read in each newsgroup, is stored in the "newsrc"
file.  You can edit this file with a text editor also if you need to.