Did this :-D !!!
i installed 1.4, and ran the shortcut with
"C:\Documents and Settings\%USERNAME%\Local Settings\Application Data\SyncToy\SyncToy.exe" -r userdata
next problem i have is, i've written a batch file to install synctoy on the client, and make the folder pairings for userdata - but where does synctoy know about userdata paring? - is this a reg setting, or is it stored somewhere?