I eventually signed the Windows application too. If you use Windows please re-download the installation file from the same link:
Unfortunately Windows is more pedantic than Mac. It is not enough to sign the application but it must also be downloaded and installed by a "unknown" number of people in order to gather enough reputation, I read somewhere around 3000 downloads. If I had so many customers I would probably stop working entirely.
Alternatively Microsoft asks developers €400 per year to bypass Windows smart screen warning straightaway but, unless a generous donor happily hands me €400, this will never happen.
Kind Regards,
Giovanni