Avast Sandbox checks installer of our server's launcher every time

I created launcher of our SA-MP server. But after extracting files (7z SFX setup archive) Avast checks file setup.exe. It causes problems with installing launcher. Also Avast Sandbox checks my launcher at first start. Link to the launcher for support: https://yadi.sk/d/OH45ZM9skKyun . Please fix that.

You can report a possible FP here: https://www.avast.com/false-positive-file-form.php

There is nothing to fix since there is nothing wrong.
avast is just doing what it is supposed to do.

Why running the “launcher” in the sandbox anyway ?
Don’t you trust your own created software ?