To open existing LEAP (LBCX or LBSX) files in OpenBridge Designer (OBD) follow these steps:
Create a new OBDX file or open an existing OBDX file (if one exists for the project)
Select Standalone workflow and Add a Standalone Group. Add the name as desired and click OK
Select the Standalone Group you created and click on Analysis to access Analytical modules and launch LEAP Bridge Steel or LEAP Bridge Concrete as required:
Once module is launched click on File > Open the existing LBCX or LBSX file.
Moving forward all changes to the model are saved in the OBDX file.