There seems to be some version conflict here. The heading for the download says it is version 4.04, but the actual download says it is 4.03. Which is it?
I've downloaded the update, executed it but get no dialog. It just runs in the background and exits. Is it supposed to do something? My version of MovieFactory says it is 4.03 still.
I also went looking when there was a recent reference here to 4.04. But I think that there have only been 4.02 and 4.03. There are inconsistencies between the ways in which it is identified on the download page.