UserAgent: Mozilla/5.0 (X11; CrOS aarch64 10452.99.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/66.0.3359.203 Safari/537.36
Platform: 10452.99.0 (Official Build) stable-channel kevin

Steps to reproduce the problem:
1. turn on auto update for apps
2. upon starting new version of app, all user data is gone:  username, password, any synced items like podcasts or books, all configuration and preferences
3. 

What is the expected behavior?
apps retain all user data across upgrades

What went wrong?
see previous

Did this work before? Yes version prior to this release

Chrome version: 66.0.3359.203  Channel: n/a
OS Version: 10452.99.0
Flash Version: 29.0.0.171