CCleaner gives the person running it the choice of whether or not to clear out the recent docs list. I identified the setting here:
https://www.msofficeforums.com/excel...ents-list.html

The hired tech should know this and should have checked with the end users whether or not the recent docs list should be retained before running the tool.



The workman and not the tool is to blame here.

This is really upsetting. I hate these situations when you are wronged, but the corporation says it's not their fault, they are not responsible for knowing everything they use. Say What??? Their employee is to blame here, and they should accept responsibility for him, or at least take some disciplinary action against him.