Depends on your contract and workflow.
If you have access to using AutoPIPE Advance or AutoPIPE Nuclear version and would like to create a Stress Isometric, than Yes, download and install "OpenPlant Isometric Manager". (OpenPlant Isometrics Manager V8i (SELECTseries 5) Software Prerequisites)
If you only have access to using AutoPIPE Standard edition, than No, do not download "OpenPlant Isometric Manager"
If you like to take advantage of managing the data and workflow of plant, structural and building projects from start to finish. The Dashboard provides a Single Interface to learn how Bentley's comprehensive products integrate together in more efficient project workflows. than Yes download and install, otherwise No.
How do I download, install, and license AutoPIPE?