Some European radios imported to the US have frequency spacing differences (e.g., EU radios tune in even numbers only). The CRUCC 2.4 will unlock them, but you may still have poor FM reception. This is a hardware, not a software, issue.
While "Universal" is a strong word, CRUCC 2.4 supports a wide array of algorithms. It covers popular brands such as: crucc 2.4 car radio universal code calculator 2.4