Windows can sometimes attempt to block Estimaker when you download it for the first time. This can be easily prevented by clicking More info and then clicking Run anyway.
You may be prompted to discard the download. This is a false positive from your browser’s malware detection, you can select Keep to prevent it from being removed.
Web browsers often try to block executables from running. To avoid this, select Show in folder and then double click the file to launch the Estimaker installer.