Nonono, don't mess with mods or anything.
Unregister with the unregister.bat in the cc folder.
Replace your current base.rte/settings.ini with this one.
Attachment:
Re-register.
Reconfigure settings as necessary.
When settings.ini is corrupted, a big chunk of it abruptly goes missing, usually the controls for player four.
I've never used those, so I usually just copy over the equivalent chunk from player three when this happens, and it's fixed.
But that's a little more complex than just replacing the entire file. It does conserve most settings though, so it's easier if you know what you're doing.
I pmed electroclan asking him to replace the officially posted fix of "reinstall cc", but he never read it, much less used it.
Any more active mods/admins want it forwarded to them? PM me.