How do I change my community back to my personal journal?
If you no longer want to keep your community journal and would like to revert it back to a personal journal account, then you will need to go to the admin console ( http://www.livejournal.com/admin/console/ ) while logged in as the community journal and enter the following command:
change_journal_type <community> person
where <community> is the username of the community you wish to convert back into a personal journal (note: you do not need the < and > characters when using the command; they exist solely as a reference in this case).
Also note that all members of the community will automatically become friends that added the community as a friend.