These commands should be used in an elevated / administrator command prompt or PowerShell.
Set old / original menus as default.
reg add "HKEY_CURRENT_USER\SOFTWARE\CLASSES\CLSID\{86ca1aa0-34aa-4e8b-a509-50c905bae2a2}\InprocServer32" /ve /f
Remove Explorer command bar
reg add "HKCU\Software\Classes\CLSID\{d93ed569-3b3e-4bff-8355-3c44f6a52bb5}\InprocServer32" /f /ve
Restart Windows Explorer
taskkill /f /im explorer.exe
start explorer.exe
You can follow the following steps to restore the new context menus and command bar. Beginning with restoring the Windows 11 context menu.
reg.exe delete "HKCU\Software\Classes\CLSID\{86ca1aa0-34aa-4e8b-a509-50c905bae2a2}" /f
Restore the Explorer command bar
reg.exe delete "HKCU\Software\Classes\CLSID\{d93ed569-3b3e-4bff-8355-3c44f6a52bb5}" /f
Restart Explorer
taskkill /f /im explorer.exe
start explorer.exe