Just to follow up, I did contact Areoquartet, and they sent me software to test if the files were salvageable. The files proved to be fixable, and Areoquartet sent trial software to test fix the files. There was on-screen flashing TRIAL text on the outcome, but I was able to ascertain that the files would be recoverable (both audio and video). I then was able to purchase the Fix Kit on-line (15 day expiration) and was able to fix the corrupted files.
Just a heads-up, you will need to make sure you have adequate space on your hard drive – Original/corrupted files, temp repair & rebuilt files ( so 3 times the space).
So, files repaired, edit complete – “Mischief Managed”
Cheers,
Jim