Hi Cormac,
If you go to the main site:
www.samsc-pm.com
And then go under ***EDIT***Software-Downloads***, you should be able to download the Catalyst v4 manual and/or the "What's new in v4.1". This also contains the pixelMAD manual.
There is also an online manual from Software-Manual
Additionally all current and future manual updates will be accessable directly from the HELP tab from the Catalyst software.