From within BridgePoint, use File > Export > General > Archive File.
Then select the projects you want to export, and select the .project file.
After successfully exporting to an archive file (zip or tar), you can then import one or more projects from that file into another (perhaps newly created) workspace using File > Import > General > Existing Projects into Workspace.
Select “Select archive file” and navigate to the archive you exported earlier.
Select the projects you want to import, and hit “Finish”. The selected projects will be imported into the workspace.