If you have not yet read the information on the Demo version see Technical support section. To install Disk Benchmark v.1.0   click on one of the following links:

From Estesoft:	Disk benchmark
From CNet:

Installation notes
Once the Setup.exe file has been downloaded, it needs to be executed on the destined computer.
During the installation process, the computer must be connected to internet (the downloading of the software comes together with the installation).
The total dimension of the downloads varies according to the pre-existing software installed on the destination computer.