Hi There @silostar
Sorry for the confusion, what Alex meant is X > Cornerstone and look for the Show Legacy Shortcode Generator checkbox.
If you don't have that option on your end, please make sure that you have the latest X and Cornerstone (5.2.2 and 2.1.3 respectively)
Updating Your Themes and Plugins
For Pro users it is under Pro > Settings
Hope this shed some lights,