I'm using Properties to set up several balancing tables in my game and i was wondering if there is a way to feed the Dashboard properties with some sort of file or I have to manually edit them each time I want to change the game's balance
You should be able to make use of this rest api call externally to update your properties. You could build a tool to better suit your needs if required. Inside of the Portal you'll have to update them manually. If you have any further questions then just let us know.