When you register for a QuickScale free trial you receive an e-mail containing a link to enable you to download the QuickScale installer.

To start downloading, click the link in the e-mail. This will open your default web browser. Depending upon which web browser you use, you will either be prompted to run or save the QuickScale Installer (qs2Install.exe).

When the installer file has been downloaded you can start installing QuickScale
You may be using a computer that is connected to a workplace network which operates some kind of web filter designed to prevent you accessing websites that have not been approved by your employers. You should contact your IT department and ask them to permit access to the quickscale.co domain.