in admin/doapproveusers.php

find this around line 178
Code
$html->ubbt_setcookie("{$config['COOKIE_PREFIX']}ubbt_admin", $ubbt_admin);

comment-out or delete that entire line.
its not absolutely necessary to touch this cookie. in the next release of UBBT, the cache cookie will actually be wiped here so the dashboard can rebuild it proper.

current developer of UBB.threads php forum software
current release: UBB.threads 8.0.1 // wip: UBB.threads 8.1.0
isaac @ id242.com // my forum @ CelicaHobby.com