What an unfortunate experience, but great lesson for all others. Thanks for posting it and for the warning.
I would document what you have, and put copies of whatever you currently have available, in the files. You still have the electronic retention however you are going to have to pay to retrieve it. The only files that could be an issue would be the ones between the last exam (or 25 months whichever is later) and when you changed processor).
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Integrity. With it, nothing else matters. Without it, nothing else matters.