We are aware of error on the iOS apps in v1.52 where the library is empty and restore is not working. New apps have been sent to Apple to resolve this problem and should be released soon. Meanwhile to access your purchases simply Force Sync your Library
To sync your library please:
Go to Profile > Preferences > Library & Storage
Click on Sync your Library > Sync Now
This will refresh with our servers and ensure that all magazines are displayed in your account. Please do not close the app during this process.