I did an archive and install from 10.3 to 10.4 yesterday and am just starting to run through all my applications. Windows Media Player is the first I've found that is just broken. It won't even start up to run... AND, so I figure maybe just download a fresh copy, only when I download it comes down in a .sitx file which 10.4 apparently has no idea what to do with it. I can't open it, it asks what application to use to open it (no clue?). Help?