Freeplaytech Forum

As the title says, I'm ordering a new screen and brightness controller, but I was wondering if there is a way I could inject the new (compatible) CM3 Software, without wiping the sd card of its themes and games, either through SSH or other means?

Yeah, you should be able to do it via SSH:

cd /home/pi/Freeplay
git clone https://github.com/TheFlav/setPCA9633.git
cd setPCA9633
./setup.sh

Thanks, would this be done on the devices side through a terminal, or on the computer side by FTP, or I guess is there an FTP alternative?

On the device's side, through a terminal or SSH connection. You will need it to have internet access.