The shear centre and area of sections are calculated automatically every time the advanced properties are calculated.

It is very easy to calculate these properties just click on advanced properties then click mesh and then click calculate.  The shear centre and area will be shown in the grid. 

To see the process in action see any online demo.  The shear centre and area will be shown once the advanced properties option is invoked.

Download Sigma-X Section to see the verification tables for shear centre and area calculation in the help files.