If there was a way to restore the password for a save file using some procedure, what would be the point of having passwords in the first place?
I understand that neither the save files nor the text files with passwords remain. Then there are three options:
1. Technical loss (such cases have happened, hello Diabler).
2. Remember the password.
3. Write a letter to Baratortch and send him the save file. He might agree to help.
P.S.: And for the future, if you have memory problems, I advise you to choose short, simple passwords, like 123 or 777, so that if you can't remember, you can at least try to guess it.