I actually missed the part where he said that. Embarrassing indeed. Aside from the windows.old folder there isn't another practical way I can think of to retrieve his old files.
It can happen to anyone, it's nothing to worry about too much - although we've both given similar advice, it doesn't seem to help the OP because that option doesn't really exist in his case.
dovjann, your only option is to try a professional data rescue service, and they will tell you how likely the data recovery is in a particular case. Of course, it all depends on how much value is in your crypto wallet - and how much the possible rescue service would cost.