George.
Maybe we have different apps? I got the Oxford Deluxe OTE/ODE.
I just checked the cached version of the iTunes page for the app
and the last update was on july 29, version 5.3. Let me know if
I'm wrong.
Either way, I have bad news. Enfour was a sub-licensee (via DioTek) of
Oxford Dictionaries. The license of DioTek expired on the 10th August,
and now neither Enfour or Diotek could sell Oxford products. The app
was pulled from the app store.
However, Enfour pulled the app from the international market 1 month before
the licence expiration (version was 5.0 at that time). They only offered the
app in the Australian market. I was able to pick the following 3 updates
by changing the country of my iTunes account to Australia (and then back).
I don't know if their Oxford apps are available to download via purchase history.
(developers could allow this no matter if the app is not available at the app store)
The other previous apps of Enfour that had the same update bug, were always
triggered on certain date, not for a change in the iOS. I have yet to update to
iOS 7 final version, but I tested the app with the beta 4 and it crashed a lot,
but not displayed any update message.
Your only chance is to check if you can download a more recent update
from purchase history. In any other case, there would'nt be more updates.
Enfour mentioned one time, that the update message (in other app) was programmed
to show between two dates and never show again.
You could try to change the date on the iPhone to december 2013, close and
launch the app and see what happens.