How to Delete both proxies in SP2013

http://social.msdn.microsoft.com/Forums/sharepoint/en-US/7675ea81-457d-4491-a224-e34471beec63/sharepoint-2013-workflow-manager-not-connected?forum=sharepointcustomization#354fae27-a882-432e-8cb3-c6dd170444e7

Based on the articles answer

I actually solved this one myself. I found out that by default, the 
Workflow Manager Config wizzard adds I workflow Service Application 
Proxy in central admin by itself. So when I registered the service, I 
ended up with 2 proxies.

The solution: Delete both proxies and re-run the register-spworkflowService command with the -force attribute

How should I do it in a course of action from the beginning to the end?

Today, I'm newbie in SharePoint 2013