Exporting in .stp

Hello, I am currently using the student version of the CATIA V5 and I'm currently attempting to save a part in .stp format. However, I don't see the option in the file type in the SAVE AS menu or in the settings of CATIA itself. 

I'm I not able to save in .stp format because of the student license or is there something else I need to download.

Thank you