Hello Roy,
The PLECS Analysis Tools, including Steady-State Analysis, are available in PLECS Blockset. Please see Chapter 8 in our current User Manual (specifically Page 162 - "Usage in PLECS Blockset") for details. Our manual is available as a free download from our website, or alternatively you can use the inbuilt searchable help tool of PLECS, where the same instructions are contained. There are also several demo models included with PLECS Blockset showing the operation of the Steady-State Analysis tool.
Regards,
Kris