Update 2009 09 06.
I discovered that the crash occurs sometime when going from two screens (Word on the external screen) to one screen. This suggests that it's simply because something isn't checking that the screen coordinates are valid.
Found that if I replaced the part of the above file between the data tags straight after the 2008\Data\Toolbars tag, with what's recreated when the file is deleted, it starts up and doesn't crash.
I have saved a working file in Evernote. Would save it here but then I can't access it when I'm offline.
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