The plug-in packages are distributed as part of the SnapCenter upgrade.
The upgrade procedure places your Windows or Linux host in maintenance mode, which prevents the host from running any scheduled jobs.
For details about upgrading SnapCenter Plug-in for VMware vSphere, see the section about SnapCenter Plug-in for VMware vSphere.
After the plug-in package is upgraded, bring the host out of maintenance mode by clicking Activate Schedule.