Can you share your matrix?
It doesn't appear that MsMars has been active for the last couple years.
A good starting point would probably be a simple table layout with either the basic column categories of Physical, Chemical, Biological or some more specific types identified for your product or process. Plug a simple numerical value (from a severity v. likelihood) with a very brief description for risks identified or control methods implemented.
The product of those can give a 'low risk, no further controls necessary' or 'elevated risk, further controls detailed in XYZ program' results.