Switch between old and new context menu
Old context menu
reg.exe add "HKCU\Software\Classes\CLSID\{86ca1aa0-34aa-4e8b-a509-50c905bae2a2}\InprocServer32" /f /ve
New context menu
reg.exe delete "HKCU\Software\Classes\CLSID\{86ca1aa0-34aa-4e8b-a509-50c905bae2a2}" /f
Restart the “Windows Explorer” via the “Task Manager” to get the changes.
Remove items from the context menu
File
HKCR\*\shell HKCR\*\shellex
Directory (only non-virtual directory, like “C:\Windows”)
HKCR\Directory\shell HKCR\Directory\shellex
Folder (also virtual directory, like “Recycle Bin”)
HKCR\Folder\shell HKCR\Folder\shellex
Drive
HKCR\Drive\shell HKCR\Drive\shellex
Prefer to delete the items via the settings of that app if possible.