I can't access Membership menu, details, etc. (localhost)

The Problem:
I'm on localhost. I installed and configured some of the site under the default localhost "admin" account. I installed "Membership" under the admin account. Now that I have created my real admin users and deleted the default admin account how can I get access to the membership plugin? I can't access anything dealing with Membership.

Things I've tried:
- I've deleted membership, reinstalled and still get the same problem.
- I tried changing the menu permission so I could at least see the "Membership" menu option, but that doesn't work.
- I recreated an "admin" account, that doesn't work either.

My Question:
What must I do to fix this so I can edit & manage the Membership plugin?