Hi Mike,
>> But the old was much easier and more straight forward for the user, especially if there is only 1 file to choose and upload.
I'd have to disagree here Mike.
The trade off is that for having to click the "start" button you get to see a progress bar. For any but the smallest of files this makes the form "better" because in the past users are confused when they click on "Save" and "nothing happens" for maybe several minutes.
Bear in mind you can rename the text on the "Add files" and "Start" buttons, so you might want to call them "Choose File" and "Upload" or whatever.
That said, the old button should still work - I'll look into that.
cheers
Bruce