A quick Google search for "product key Letasoft Sound Booster 12 verified" will return thousands of results. But before you copy-paste a code from a forum or download a "keygen," consider the risks:

By purchasing a legitimate key, you ensure that your computer remains secure and that your audio experience remains distortion-free. Don't let sketchy third-party software ruin your hardware; stick to verified sources for the best sound experience.

a license through their secure portal. Licenses are often sold for single or multiple computers.

Once you have your product key: