Hi Filippo,
Thanks for your support purchasing a license of QtFuzzyLite.
I reckon you should have your license in your email box. Please search for it using terms like “QtFuzzyLite” and “FuzzyLite Limited” and contains attachment (some file “.flk”). It will be much easier for you to find it than it is for me. Let me know if you cannot find it, though.
Cheers,
Juan.