Hi Jose, so it's a couple different things there. The main thing is that you can only use the appdata installation for MoI v4 but it looks like you're using MoI v3 there.

For MoI v3 copy it into C:\Program Files (x86)\MoI 3.0\ui\nodeeditor

Then the shortcut to launch it should look like this:
moi.ui.createDialog( 'nodeeditor/index.html', 'resizeable,defaultWidth:680,defaultHeight:420', moi.ui.mainWindow );


For v4 you can put it in the appdata folder, which you can get to by %appdata%\Moi in the file explorer address bar, that will expand to:
C:\Users\<username>\AppData\Roaming\Moi

And for v4 you would use shortcut key you have.

Does that get you set up?

- Michael