Like everyone else says, you almost certainly should try not to use this node, and should try to find a non-deprecated way to do it if at all possible.
However, just as a general note, if there's a hidden selection on any node, no matter why it's hidden (deprecated, scripting, developer mode, etc.) this should always work to create it (without needing to install anything as an addon or set any INI flags):
1. Create a property or invoke node from the object type you want the hidden property or function of. In this case, it appears to be an Application invoke node.
2. Select the node (and nothing else), then press control-space to bring up the quickdrop window.
3. In the quickdrop window, type in the exact name of the property or function you need (case insensitive, but spacing and punctuation needs to be intact).
4. Press Control-Shift-B.
Doing the above I was able to create it in 2018.
