I grabbed a local copy way back when.

Unzip and Put this folder in your APPDATA folder of the MoI install, then add this line to where you want a button to launch it. I use Sidepane.htm, just under "History" entry... (Note, I made my own icon i included here as a png. You can replace your own and change the line in the code for the new named icon..

<td><vcenter><moi:CommandButton icon="icons/dmorril.png" onbuttonclick="moi.filesystem.shellExecute( moi.filesystem.getAppDataDir() + 'moi_ref\\index.htm' );">JavaScript ref</moi:CommandButton>
                                  </vcenter>      </td>

[EDITED: to change code data from old create dialogue to external html handeler. Works like a charm!]