It's really easy to create a Tour duplicate in Chameleon -- simply hover the Tour you want to copy and select the Copy option.
When you do this, a new Tour is created, with the same title, but appended with "(Copy)".
This Tour will be in Draft mode, regardless of the status of the original Tour. It will also not carry any analytics from the Tour it was copied from, so that you can use it to start afresh.
Why would I need to copy a Tour?
Copying a Tour is useful in many scenarios. For example, you may want to:
Transfer a Tour from your staging environment to production.
Run Tour experiments using A/B Testing.
Push your final iteration live by adjusting the Target Audience.