Hi Alberto

Windows: extract archive to C:\Users\<username>\AppData\Roaming\Moi\nodeeditor

Mac: extract archive to /Users/<username>/Library/Application Support/Moi/nodeeditor

Run this command to open Nodeeditor window:
moi.ui.createDialog( 'moi://appdata/nodeeditor/index.html', 'resizeable,defaultWidth:680,defaultHeight:420', moi.ui.mainWindow );