HowTo Remove Context Menu Handler with powershell

Hi,

I'm trying to remove some Context Menu Items with a Powershell script. Therfore I'd like to delete the following registry Key:

HKLM\SOFTWARE\Classes\*\shellex\ContextMenuHandlers\7-Zip

Remove-Item -Path "HKLM:\Software\Classes\*\shellex\ContextMenuHandlers\7-Zip" doesn't work at all. I think that the "*" recognized as a wild card and will be implemented accordingly instead of yust a Registry Key with Name "*".

Does someone has experience with this kind problem? Is there a way to  temporary disable the Wildcard Function?

Thanks for Your Help,

Patrick