Can I have a free download of PIBWin version 2.0 for 64 bit system?
Yes, you can use the 2.0 version that is compatible with 64bit operating systems. I have downloaded and installed the application on Windows 8.1 64bit and it worked normally without errors.
After installation, the Matrices are found in the installation directory. You will need to browse manually to C:\Program Files (x86)\PiBWin\Matrices
C:\Program Files (x86)\PiBWin\Matrices
Download page: https://www.som.soton.ac.uk/research/sites/pibwin/download/