I screwed up.

[Professor_Smiley]

Hey, I screwed up.
I deleted the admin group because I don't need it on my server, but now me (superadmin) cannot edit admin settings for addons such as CW2.0, Falco Prop Protection and other stuff.
I created it again but problem isn't fixed.

I can't reinstall ULX because I have my loadouts and restrictions set, my server settings, my groups and everyone in my groups will be reset.
What do I do?

[Radek]

You sure you re-created it with the same name? Usergroups are actually case-sensitive (So for example, you can have "superadmin" and "SuperAdmin" at the same time. "admin" and "Admin" for example are two different usergroups).

[Caustic Soda-Senpai]

Restore ULX to factory settings, follow the FAQ for how to do so.

[Stickly Man!]

Make sure "admin" is still in your inheritance chain. For example, with the default groups: make sure admin inherits from operator, and that superadmin inherits from admin.