For example, tutorial in Youtube https://www.youtube.com/watch?v=-w2EJCdhtj0
offers the possibility to set up the Z-base. In the version which I have installed this option is not offered. Please comment
The Youtube videos are a bit outdated, and we will update them shortly.
During the STEP Export options uncheck "Show PCB Simulation Options" and you will have the ability to manually assign the Z-Base stack up values (similar to the YouTube Videos).