I'm pretty sure Bashir has moments of reflecting on faked shortcomings when no one's around before the genetic engineering retcon.Deja Q would seem to blow that theory to pieces. Why would Q pretend to have no powers, and then pretend to be a second Q who appears to Q with no one else present and has a conversation with him and gives his powers back?

The file name is rather too specific to actually have anything to do with Khan Noonien Singh or the Eugenics Wars. It's obviously named after Khan Noonien Singh.