I'm having difficulty updating the DJI GO 4 app. Currently MP / Android Note 4. I have version 01.04.0400 (recently updated) and the app is 4.1.10. After each flight my phone notifications indicates that the new version for the app is available 4.1.18. All attempts to update are futile. Its been like this for just about a year. Why am I being told a new version is available but can't update? The app installed on the phone doesn't give me the option to update. Just OPEN or UNINSTALL. Please help!