The only way to upgrade an amazon-purchased app is through the amazon store.
You are right -- the problem is caused by changes in kitkat. Google changed how permissions worked, causing CC to die with a "no permission" failure. We have a fix for this problem available on google play, but for various reasons I can't push these fixes to the Amazon store. I just asked my partner (son) to do it, and will post here once that process is underway.
Sorry about the problems.
