Sorry for asking but I kept forgetting..
So I need to write in down somewhere.
after each of these steps :
region change - just restart the player
fw update - Reset all settings or Restore to factory configuration
Am I right ?
Region change - just restart
Fw update - nothing needed here, the player basically restarts itself and there's no need to reset the settings.
If you ever decide to flash an older firmware, like 1.20 for example, you would have to use the Rebuild database option, but that's all.