To import the objects and / or structures of a project, access the "Manage Environment", by clicking on the shield icon or by the profile, as shown below:
To perform this import, you need to be the "Master" administrator of the project you are importing.
You can select whether to import only the structures, only the objects or both;
If you import any structure / cockpit / connection that has the same name as an existing structure in your project, a screen will open for you to rename the imported structure, cockpit or connection.
After that, just click on the Import button!