Looks like this line needs to be updated in the readme referencing the ICAO files: "Prep the portal as detailed here (https://learn.adafruit.com/adafruit-matrixportal-m4/prep-the-matrixportal), put the code, secrets and icao files on, put your wifi details and the geo box you want to search in the secrets file, and you should be good to go!"
Looks like this line needs to be updated in the readme referencing the ICAO files: "Prep the portal as detailed here (https://learn.adafruit.com/adafruit-matrixportal-m4/prep-the-matrixportal), put the code, secrets and icao files on, put your wifi details and the geo box you want to search in the secrets file, and you should be good to go!"