Most of them are the audio styles from the Tyros 5. Not really any point in loading them as there are newer styles on Genos that replace them, but they are available should you want to download them. You will probably need to use the Yamaha Expansion manager software to add the styles. The remaining download is the superior pack for the new OS update on Genos. Once you've installed OS2 on your genos, you can install this pack to get new voices and styles, again I used Yamaha Expansion Manager to do it.
By the sound of the file you describe, it hasn't completely downloaded so you've ended up with a partial download in your chrome browser. You need to wait for it to completely download, then you should be able to import it into YEM.
Simon