Altiris CMS 7.1 - PC anyWhere Plug-In

I have just applied the latest pcAnywhere patch to our Altiris CMS 7.1 server. I wanted to check the agent\plug-in configurations to ensure that no changes have been made after I applied the patch. I have noticed two plugins that seem to be very similar. Once is called "pcAnywhere Plug-in for Windows - Upgrade" which is enabled and the other is "Push of pcAnywhere Plug-in for Windows - Upgrade", which is not enabled. Could anyone inform what is the difference between these two pcAnywhere plug-ins and if they both should be enabled or should I leave as is. Thanks, Greg City of Victoria