When installing, I made the site 'account login only' but this is proving too tedious to manage. Is there any way to make it registration only without reinstalling?
Topic on Project:Support desk
If you just want to let users register their own accounts, then remove the line $wgGroupPermissions['*']['createaccount'] = false;
from your LocalSettings.php file. If you want to let users without accounts edit too, then also remove $wgGroupPermissions['*']['edit'] = false;
. You should also consider adding $wgNoFollowLinks = false;
to avoid spam, after you make either of those changes.