Just finished a chat session with Amazon. The latest Kindle app updated without any warning that it's not compatible with Android 2.2. According to Amazon's Manmeet you have to be running Android 3.7 or higher. So DON'T update if you're still running 2.2 and no the older versions are not available. For me the app would open to the Kindle splash screen and then in a moment send me back to the home screen. Thankfully, I had a backed up copy of the old Kindle app via Titanium and restored the old app and data from there.