Having read accounts of others having a problem with the RM App on Android phones since the June 30 update for a new DropBox API, I installed RM for the first time on a Moto G4 Play phone (Android 6). On launching, I get the error message that "RootsMagic has stopped working".
The app still works on my old iPad 2, still downloads from DropBox even though it is running the Dec 2015 version 1.2.1 and despite not having done the update to 1.3 for the DropBox API rev.