The Windows installer (Maxiful-x64-setup.exe) is code-signed by Maxiful AB through Microsoft Artifact Signing. Windows may still show a SmartScreen warning on a new release until enough people have installed it: the warning names Maxiful AB as the publisher, and you can match the checksum on your setup page before you run it. It needs Windows 10 or later.
A word of caution
A valid signature confirms who published the file, but good habits still matter. Only install the file you downloaded from your own Maxiful account, never from an email attachment, a forum, or a re-hosted link. If you want to be thorough, verify the file’s checksum against the one shown next to your download button; Verify your download (SHA-256) shows how.