You can download the versioned files from the EDITIONs accessing the edition number, you can do either thru GUI or command line :/belgacom/main/client1/EDITION/#2448/templatedata
To fill in some of the blanks here - if you run iwrlog on the file in question, it will show you the versions and what edition they are in. If the edition is a named edition, you will see it if you list the contents of the EDITION directory. If the files were just submitted and not published into an edition, the submit operation creates "hidden" editions - which you won't be able to see by listing the contents of the EDITION directory - but, if you know the edition number, you can access it as described by reji_kv above.
Just curious, does iwmigrate also retain these "hidden" editions?