Cubase Pro 9.5 Installation Issue

I have just downloaded the Cubase Pro 9.5 through Download Assistant. After download, it says there is an error. When I checked the download folder, I found 2 files downloaded;

Cubase_9.5_Installer_win.zip.sda-download
Cubase_9.5_Installer_win.zip.sda-download.aria2

How can I un-zip these files? Thanks.