download .SAR file with SAPCAR.exe

Hi

I have downloaded SAPCAR.exe from marketplace (SAPCAR 7.10 -> Windows on IA64 64bit)

I have to use this to extract .SAR file.

In command window I came to the path with .SAR file and write SARCAR -xvf <filename.SAR>

But I got error: 'SAPCAR' is not recognized as an internal or external command, operable program or batch file.

I have also rename SAPCAR.exe to just SAPCAR. I also have place the SAPAR file in the same path as the .SAR file.

Is there anything else I should do?

Where should I place the SAPCAR.exe file? And with what name?

Thank You

BR

Sadaf