in attachment you can find the OctaveX plugin.
Unzip the file and put the octaveX directory in the application plugin folder. If OctaveX does not appear in the "Insert/Session" menu, update the plugins with the menu "Tools/Update/Plugins".
Some help is available under the menu "Help/Plug-ins/OctaveX". Requirements: Octave v4 or newer, with a working octave-cli command.