Cannot remove vShield Manager 5.1

Hello Community,

I can not remove the vshield manager plugin from vcenter.

I tried it via http://IP-VCENTER/mob and unregister extension also via powerCLI.

After I do the unregister the entry is gone but after vcenter reboot it is there again.

What am I doing wrong?

I am also confused that after install the firewall appliances the vmservice-vswitch is still in the inventory.

Is there a way to proofe that vshield was uninstalled successful?

Cheers

Dennis