If you love Football Manager 2021, support the developers who make your game better. Spend the €5. Get your legitimate key from the official website. Not only will you have peace of mind regarding your computer's security, but you will also receive automatic updates whenever FM 21 patches, ensuring your editor never breaks.
Go to the official FMRTE website (fmrte.com). Navigate to the "Download" section and select FMRTE 21. Ensure you download the version that matches your Football Manager 21 build (e.g., 21.4.0). fmrte 21 activation key