BigM, try to use Total Commander's "Compare files by content", that could help you... you may just compare old newton_main.c and new one... its looking like this
http://img192.imagevenue.com/img.php?image=32924_1_122_107lo.JPG

i'm going to uplate to 2.0 (17 beta) after wrapping compounds and magnets(black/white hole and buoyansy)

picoder, thanks for comment