Download and open the zip file into a directory. Make this directory the "Current directory" in Matlab. Type "intempopt" in the command window. Use the sliders to change the values of the parameters in the model. The utility function is CES and you can change the value of eta. The hold button will hold a particular graph as dots so it can be compared to other graphs. Hold can be turned on or off.
The handout explains some things that can be done with the program.