Yes, you have to reinstall all other feeders, but it is not a big deal.
Before you write fresh image, copy-paste feeder keys in Notepad on your desktop/laptop and save notepad:
Plane finder key:
The sharecode is in the file /etc/pfclient-config.json
Scroll right to see it in full. Your Planefinder sharecode is the last item in this long line.
{"tcp_address":"127.0.0.1","tcp_port":"30005","select_timeout":"10","data_upload_interval":"10","connection_type":"1","aircraft_timeout":"30","data_format":"1","latitude":"xx.xxxx","longitude":"yy.yyyy","sharecode":"zzzzzzzzzzzz"}
Flightradar24 key:
The fr24key is in the file /etc/fr24feed.ini
Radarbox24 key:
The key is in the file /etc/rbfeeder.ini
Installation commands
Planefinder
wget http://client.planefinder.net/pfclient_4.1.1_armhf.deb
sudo dpkg -i pfclient_4.1.1_armhf.deb
Flightradar24
sudo bash -c "$(wget -O - https://repo-feed.flightradar24.com/install_fr24_rpi.sh)"
Caution: , During configuration of fr24feed, never choose “Receiver DVBT”. Choose Receiver: ModeS Beast(TCP), host/port: 127.0.0.1:30005
Radarbox24:
sudo bash -c "$(wget -O - http://apt.rb24.com/inst_rbfeeder.sh)"
sudo rbfeeder --setkey xxxxxxxxxx --no-start
## Replace xxxxx by your actual key
## Press Ctrl+C to break log output.
sudo systemctl restart rbfeeder