In the latest release OpenBridge, ProStructures is included in the installation, not only ProConcrete. However, users will use a ProStructures license to activate all the tools fully. As for enabling ProStructures in OpenBridge Modeler or OpenBridge Designer:
Step 1: Pick ProStructures>Activate from the OBM workflow.
Step 2: Click Activate ProStructures from this window and choose to include it or not as default.
Step 3: Change your workflow to Structural Detailing.
All of ProConcrete and ProSteel features from ProStructures are available immediately.
As shown in the screenshot below, before performing these steps. only the regular ProConcrete workflow for rebar detailing is available in OBM:
After Active, the user has now the option to Deactivate, as shown in the screenshots below:
Therefore, users can use ProStructures inside OpenBridge Modeler only once, for a specific time, always, or never according to their specific needs for each project.