and remember to 'check' the box IN THE SAME SCREEN that says 'Always use this program for this file type' (something to that affect).if that not work rename your media files extension name to something different (jargon three letters) EG: Song01.wav will now be renamed Song01.bbb. click it and seek for your media player in which you want to run wav / midi files under. If not work than Right click a wav file.hopefully it says 'Open With' in the menu. Select the file types you want *.wav ,*.Midi to play through.Configure your media player to play Wav or midi should be under settings or pregerences.if i am wrong.than i suggest you simply re-install the program and and Not 'check' the boxes that ask u 'Which file type do u want wingroove to be the default player for?'