On windows, BIAB 2011 build 319. I play a .MGU file and after playing the first two measures correctly it then continues to play as it should and simultaneously plays from the first measure again. Result is the song overlapping itself as if played from measure 3 and from measure 1 at the same time. It sounds horrible. I tried rendering it to a .WAV file and that worked correctly. The .WAV sounded right. This scares the heck out of me. Will all my files .MGU (I have lots from many years on BIAB)be useless? Please help.....