For those running DVDProfiler on Android 6 (Marshmallow): the location of the database has changed. If you chose the external SD card to store the database, earlier versions of Android put it in

Invelos/DVD Profiler/LocalData_0

On Android 6, the location is:

Android/data/com.invelos.dvdprofiler/files/LocalData_0

This is for one database, syncing with a PC. Important if you want to copy over your data after a factory reset or to another phone.