EDA simulation tool settings questions

Hi:

I'm using the Quartus II 15.0 Web Edition, and when I tried to specify the option for generating output files for use with other EDA tools, my option of the tool setting only includes Active-HDL, Riviera-PRO, Modelsim, Modelsim-Altera, Questasim, custom, but I want to select the VCS. I found the Internet that the VCS should be one of the option. So should I download something else that can make me have VCS option?

Thanks so much.