I followed the steps in this Experts Exchange video on how to Install vSphere Update Manager
. Everything seems to install correctly but nothing is showing up in my Plug-Ins Manager in the vSphere Client (not the web client).
This is an ESXi 5.1 host connected to a Windows 2008 R2 VM with vCenter 5.5 and the most recenter version of Update Manager. I'm using VMware vSphere Essentials.