I suspect that you must leave your WiFi on for some time, perhaps overnight, so the tablet can check with the Amazon App Store.
My only theory is that the last upgrade went bad for some reason, but not so bad that CC totally crashed. That is the only way I can explain what you are seeing. There is no combination of CC options that could cause it. It I am right then things might get fixed in the next upgrade. At least I hope so.
And thanks for the patience!