Not sure if you are part of the preview for Workbench but the getting started is here: Tutorial: Installing the Particle Workbench developer preview
Do you know if the introduction of Workbench means that Dev is going away?
As you guys know, I'm a community member like everyone here so I don't have an official answer.
However, I do know that moving forward, Particle Workbench will be the Desktop tool that will be given a lot of resources VS Particle Dev.