New User Creation Whith Reg App

I installed NC registration app and when user is registering whit this it set this user also an admin , now I have many admins.

I can discard it from my main admin page,but is there any ways to do is by default??

I mean , I don’t want to do this every time ,when new user is created.

I want that to be a one uniq admin … for whole time … It’s possibl??