Sarah Purdy tackles a scenario where Database Disabler returns the following error: You are not registered for the selected utility.
Database Disabler returns the following error: You are not registered for the selected utility. – Microsoft Dynamics GP Community
SQL & DataInstall, Upgrade & AdminMicrosoft & the GP Ecosystem
Archived post from 2014. Dynamics GP and the links it points to have changed since; check current documentation before relying on version-specific steps.