Hi,
Yes, it works in 32 or 64 bits systems. You don't need to install server components any more, they are automatically installed by 3CX.
You can download the latest version from http://www.3cx.com/downloads/3CXVAD2.msi
The manual is available at http://www.3cx.com/manual/3CXVADManual2.pdf
Regards,