I can't find the "3D models and texture mappings" tab

Hello!

I just downloaded McCreator, and Id like to import a block I made from Blockbench. I was watching a tutorial, and tried to follow along. It got to the part where you had to go onto the "3D models and texture mappings" tab, but I cant seem to find it. 

I also tried to import using the small icons on the top, but nothing seemed to show up.

Am I doing something wrong? D: