Reboot into recovery and hit wipe, choose advanced, only check cache and dalvik cache.if you want a easy way to get into recovery you can use "adb reboot recovery" or enable developer menu and check off advanced reboot and your reboot menu in cm will give you the option. There's always the normal waybas well, hood volume up as soon as you turn the kindle on until you see the twrp logo. I think it is volume up, might be volume down, I don't do it that way much so it is hard to remember.
Also to refer to the question about hashcode, he said it on the cm 11 thread as a heads up on the latest nightly that he would be rolling out.
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