Archiving a design

What is the best was to archive a design in Upverter for backup locally, and so that I can import to upverter and recreate the design later?

You can download this design as JSON. Iater you can import this file back, during project creation.
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I tried the JSON export… must be something in our particular design that causes a failure on import. If I do a simple 2 part design it works fine… but the full boards do not. In an infinite error loop…