uninstalled vum but still appears under service status

I installed VUM on a separate vm from my vcenter server. I uninstalled VUM but in vcenter service status it's still showing the vmware vpshere update manager extension with an alert (can'r retrieve health data) and I still see it in manage plugins. How can I remove VUM so it also removes it's hooks from vcenter?

This is version 5.1U1

Thanks