Portable Apps Themes installation problem

I must be missing & overlooking this somehow, but how do you add the "theme" option to the Portable apps option area? I have a portable apps installation that has been installed & running at work for some time that has this option. But when I downloaded & install a new version of portable apps to put on a flash drive, it doesn't seem to have this "theme" option. What am I doing wrong here? I downloaded the basic platform (2MB). Do I maybe need to download either the 'Suite Light' or 'Suite Standard' editions in order to get the theme option to appear? Or is it maybe something that can be added later after the basic install? Or was it possibly taken out for future releases due to some issues.