To install the Function module, Press the button "Install Function Module" on the Windows->Preferences (Select CEON ABAP editor->SAP NetWeaver/ERP settings) screen. The Function module will be automaticly installed.
If you like to install the function module (function module file is part of the product package) manually:

Download function module for NetWeaver 7+/2004s or SAP ERP 6+
(Username and password is provided by your order confirmation email)