You can do it manually from 1 device to another but it is a 4 step process.
1. Back up data to SD card from Goals p4ogran menu
2. Copy data from SDcard (Goals_Backup/databases/ecl._goals.db*) to dropbox
3. Move data from drop box to. SDcard/Goals_Backup on 2nd device
4. Open goals on 2nd device and open the program menu. Select More. Then Backup from SDcard
It is a pain to do this every time. It does work and it only takes 2-3 minutes after you have done it a few times.