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Re:Launching Today: CircleCI 2.0 Reaches General Availability by nailer on Tuesday July 11, 2017 @06:19AM (#14742910)
Ha maybe I haven't been using 2.0 then - I thought Circle 2.0 meant Circle 2.0, UI and backend.
Re:Launching Today: CircleCI 2.0 Reaches General Availability by ssemmaprise on Tuesday July 11, 2017 @06:23AM (#14742928)
More on going from 1.0 to 2.0 here: https://circleci.com/docs/2.0/migrating-from-1-2/

You should also see a little icon in your dashboard that says 1.0 or 2.0 to the right of each of your builds - that will tell you what version you're on :)