Related: How to View Saved Wi-Fi Passwords
Registry value for context menu item
Download ShellExView. Start the app and use the Find tool to look for the context menu entry for which you’re looking for the registry entry. Although the search is not case sensitive, you must enter the correct term. Right-click any of the column headers once you’ve found the entry in the list of context menu items.
Select ‘Open CLSID In RegEdit’ from the context menu of the column header. This will launch the registry editor and navigate to the key and value that controls the context menu item in question.
In theory, you can now edit the item, but there are some limitations you may encounter. You can add items to the context menu, but you can’t change the default items. For example, the Open With option is a default option, and the registry editor won’t let you change anything under that key. You might be able to force the change by using a context menu editor or taking control of the key, but this is dangerous. Before you begin, make a backup of the registry.
You’ll find it much easier to edit entries created by third-party apps, but you should still back up the registry.
This app should find all context menu entries, but if you can’t find something specific, try the ShellMenuView app by the same developer. It focuses on the various entries added by third-party apps rather than the stock/default Windows 10 entries, but it might help you find what you’re looking for. You’ll be able to find all context menu entries and look them up in the registry using these two apps. There’s a dedicated registry value column in ShellMenuView that you can use to navigate to the registry entry for it.