I found that I can do this.
1. Modify and save your jbossmq-state.xml file
2. Use the jmx-console, locate and click on the stateManager link.
3. Click on the loadConfig link.
4. Locate and click on the link for the appropriate JMS destination.
5. Click on destroy
6. Click on create
7. Click on start
8. Click on the link for the durable subscription and you should see the new durable subscription listed.