PyRx is a Virtual Screening software for Computational Drug Discovery 
that can be used to screen libraries of compounds against potential drug targets. 
PyRx enables Medicinal Chemists to run Virtual Screening form any platform and 
helps users in every step of this process - from data preparation to job submission 
and analysis of the results. While it is true that there is no magic button in the drug 
discovery process, PyRx wizard features easy-to-use user interface and chemical 
spreadsheet like functionality that makes it a valuable tool for Rational Drug Design.

Visit http://pyrx.sourceforge.net/ to learn more about PyRx.

===================
Upgrading from an Earlier Version

If you have previous version of PyRx installed, you can upgrade to the
latest version by downloading latest source tarball from
http://pyrx.sourceforge.net//downloads

Unpack source tarball into destination folder: 
tar -xzvf PyRx-Version-Source.tar.gz -C %destination
where %destination is one of the following:

On Linux:
 
~/PyRxFolder/lib/python2.6/site-packages

On Mac:

/Library/MGLTools/PyRx/Python.framework/Versions/2.6/lib/python2.6/site-packages

On Windows:

C:\Program Files\PyRx\Lib\site-packages


