I followed this tutorial Configure an Environment for Apps for SharePoint 2013 to create an app domain called mytestapps.com but later decided that's not a good name and I deleted the domain Zone and created another one called mjrapp.com.
My problem is that when I install apps, they are still using the deleted domain(mytestapps.com) instead of new one(mjrapp.com).
I have tried to change the App URLs in the central administration to be mjrapp.com but not working. I have also tried reinstalling the app service, subscription service and metadata service but still not getting what I want.
Any assistance will be appreciated?