I grabbed the zipfile link off the front page (which appears to be the server update pack NOT the client update pack). After a bit of research, I realised my error, and went to the download page and grabbed the client autoupdater, but it didn't recognise that an update needed to be applied. So I deleted the folder, reinstalled 030, then the 031 hotfix, then ran the 032 autoupdater, it grabbed the files, and I no longer get the modified files error.