I purchased the application before and now, why I have to pay for an annual subscription?
With the recent update of the Android application (version 3.0), we found an issue that users cannot unlock the promotional screen of the application even though they purchased the application prior to the latest update. Most cases are not being recognized from their Play Store account whose devices are unknown to us and without any Air Navigation Pro purchases via PlayStore.
We are doing our best to track and validate all purchases being made. That is why, it's best to use from the start of the application you specify your registered PlayStore account to check again.
If you encounter such issue, please contact firstname.lastname@example.org and indicate your Services account (username or email address)