While newer versions exist (such as 9.8 or the newer CIMPLICITY/Machine Edition unified releases), version 9.5 is viewed by many as a "sweet spot." It is new enough to run on modern PCs but old enough that it doesn't aggressively deprecate support for very old hardware like the Series 90-30, which is still widely used in thousands of facilities globally.
However, downloading industrial control software is not the same as downloading a media player or a video game. This article covers the features of version 9.5, the risks associated with "free downloads," and the correct, legal way to acquire the software for your automation needs. proficy machine edition 9.5 free download