"Unregistered Usergroups"

[IFx DDay]

I'm very new to vbulletin.

I believe I may have messed up my usergroups. I change all of the default usergroups in the usergroup manager instead of using custom usergroups below it.

I have a gaming site and I have specific sections that I'd like to give permissions to specific groups. Well..I believe I have done this correctly, but in doing so saved over the settings of "unregistered usergroup". I assume that was one of the default groups.

I checked by logging out and I was able to see the entire list of forums whereas I'd like to make it to where people who are unregistered cannot see any forums.

Can I go back and fix this?
Thanks