Version 4.3 works well!
After purchasing and installing version 4.2, I could only make it work once. I looked for a guide or troubleshooting tips on the hummersoftware website but found nothing that would advise me of the steps required to convert the dates of batches of images I had imported to my Mac back to the original created date. I emailed the developer and he got back to me right away with an updated version. It worked fine and the new app is now simple to use. Make sure you purchase ver 4.3.
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Image Exif Editor