Official comment
You can have multiple versions of the app installed on one device.
The 'p' version was a prerelease version that you must have gotten to address some specific issue. You should now be on one of the following:
The 'a' version is what you get from the Play Store. The 'b' version is the same as what you get from the Play Store but it is an APK. The 'e' version is built with the Enterprise version of the DJI SDK and is available via APK.
Both of the APK versions need to be downloaded directly from our site to upgrade.