Since version 2017 "export to file-geodatabase" is only available in advanced-version, before 2017 this was also part of the basic version - which we use to edit / build single 3D-modells for ArcGIS (like "sketchup for ArcGis").
This is ridiculous - How will you achieve seamless integration in ArcGIS if you do not (basic) support your own in-house-Formats, which was our main reason to buy cityengine?
Now its (again) easier and cheaper to use Google Sketchup and import to ArcGIS via other File-Formats...
Please take back that decision and continue to license "export to gdb" as part of the basic license, as it used to be.