first of all you have to checkin package in software. you can have a policy created to deploy agent and dont forget to tick
i will also ask you to type in the following command in the mcafee agent 4.5 : framepkg.exe /upgrade
the upgarde should be done.
If you check in Patch 2 and Global Updating is enabled the patch will deploy to every machine when they next communicate or someone runs a right click Update Now.
I checked in Patch 8 for VSE 8.5 and it deployed to every machine because Global updating was enabled.
Please correct me if im wrong.