Windows raises a security popup "Windows protected your PC" during installation

[QuestioningEspecialy]

Windows 10 64bit
Tested v2.5.8, v3.0.0, v3.0.1, and v3.0.2 from their respective release links.

Below is the blue popup I get for every v3.0.x version:

Microsoft Defender SmartScreen prevented an unrecognized app from starting. Running this app might put your PC at risk.
App: DownZemAll_x64_Setup.exe
Publisher: Unknown publisher

VirusTotal's v3.0.2 page says "SecureAge: Malicious" while Avira and NordVPN on my local didn't find anything wrong with it.
So~ what's up with the v3.0.x versions?

[setvisible]

Hi,

The first message from Windows Defender always happens to me too. I guess it's because I'm the first guy in the world to install it :)

For the second question, the "SecureAge" is probably a False Positive on the installer and "Uninstall.exe" too. Same with the "launcher.exe" which has been detected as containing a W32.Malware.Gen by "Webroot". I don't know why, but am happy to see that the majority of antimalware protection recognized it as a secure project. Maybe the SecurAge and Webroot software consider it as suspicious because the files are not signed (see message details: "File is not signed"). Indeed there are not signed.

More generally speaking, this project is safer than most of others: Indeed it uses 100% open-source libraries, plus the compiler is also free and open-source and verified by the community (GCC). This project is transparent, which is the best protection, and a good argument against malware suspicion.

Regards