Find the file on your computer.
Once you've found it, make sure iTunes is closed, then delete the file.
Then try downloading the update from iTunes again.
It may be a problem with iTunes' server. Many have reported issues (including myself) of the same situation on the Mac App Store with duplicate updates of certain apps.
Thank you, that seemed to finally work.
I did as you suggested, quitting iTunes. My iTurnes library is not on my main hard drive because of its size, (it's on a separate drive), so I to delete the file, I made two deletions. First I went to:
iTunes All:iTunes Music:Downloads
and deleted the
Then I went to:
iTunes All:Mobile Applications
And I deleted the
Finally, I relaunched iTurnes and went to the iTunes store, and "repurchased" the application, which told me I'd already bought it and it re-downloaded the program AND it's update without a problem.
Thank you so much for your help.