Help fixing my wma files?

my wma files wont play any more all 474+ of them and i want my music back can someone help me fix this i tried all the program i could find to fix them but nothing worked vlc is the only thing that will play them but i need them for my mp3 player to convert from can someone help me get this fixed without converting them and vlc's command prompt said invalid seek position but still played them it happend somewhere between picard and mediamonkey and pickard says not ASF file