Hello Erkan,
After the ProStructure integration with OBD-GC, we only have Structural Sections available now. For the time being you can try to use the Upgrade Legacy Sections to convert the xml based structural elements to PS based MDB elements then the Structural Member dialog will read the newly converted dialog. You can access the utility by going to the backstage-> Utilities-> Data Utilities -> Upgrade Legacy Sections. See the below image for reference.
After the conversion of any of the Concrete sections, you will be able to see them in the Library. Please see the below image.I hope this helps you.
Regards,Alifur
Answer Verified By: ERKAN EYMUR