It is not Adobe Flash.
Those two files highscore.dat and prefs.dat are your saved games! Those are only files I have for Playfirst games (besides logfile.txt).
I don't know why your game does not see them. Maybe Windows 10 puts them in different folder than Windows 7?
Oh, and if I rebember correctly, Playfirst games are very picky as for their location. That is, if I move the game to another folder, old saves do not work any more.