Quoted from erak:Because it partitions the SD card once you burn the image to the card.
I tried to file a help ticket but all I get is a 404 error from their website. WTF? Arrgh!!!!
CGC's webform has been up and down (mostly down) for many months, usually they are totally uncontactable and even if you can email them they will just ignore you anyway. I would not be surprised at all if they disabled the contact form this time on purpose just before releasing the update so they didn't have to put up with customers asking questions.