Shell context menu registry extension doesn't work when default program is other than Notepad

Question

I'm trying to add a "Tail" entry to the shell context menu for .txt files, but whatever I do the option just does not appear.

My .reg file looks like:

Windows Registry Editor Version 5.00

[HKEY_CLASSES_ROOT\txtfile\shell\Tail]

[HKEY_CLASSES_ROOT\txtfile\shell\Tail\command]
@="tail.exe -f \"%1\""

It worked fine in Windows 7. Has this feature been disabled in Windows 10 (64-bit)?

How to make it work again?

==EDIT==

Some additional findings:

The default Open action is associated with Notepad++.

If I choose the built-in Notepad application as the default Open action, then my "Tail" menu item shows up. But as soon as I choose Notepad++ or any other app as the default Open action, my custom context menu item disappears.

Answer 1

This registry setting should help.

Windows Registry Editor Version 5.00

[HKEY_CLASSES_ROOT\Applications\notepad++.exe\shell\Tail\command]
@="tail.exe -f \"%1\""

Only downside is that "Tail" would show up for every file type associated with Notepad++. If you don't want that, post back so that I can make another REG file that applies only for .txt files.