What is MCR installer
MCR stands for MATLAB Component Runtime.  
The MCR allows MATLAB compiled programs to run outside of MATLAB.  
It works in a similar way to the Java Virtual Machine (allows the execution of java scripts), 
and contains a series of *.dll and various other files, that are able to interpret and execute a program written in the MATLAB language.  
The MCR is specific to the version of MATLAB that produced it.  
For SaSAT, we used version 7.6 of the MCR and was written in MATLAB 7.4.0 (R2007a).  
If you do not have version 7.6 of the MCR installed, or are unsure, then it is best to download the SaSAT with the MCR.  
See: http://www.mathworks.com/access/helpdesk/help/toolbox/compiler/f12-999353.html for more information regarding the MCR.