Try the RoboHelp Tour Introduction (grainge.org) and see if that works as expected. It's a different skin but I just generated the same project using an Indigo skin and it is working in the same way as on my site.
Try generating to a new location and if that fails create a new copy of the skin with a slightly different name and try that.
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See www.grainge.org for free Authoring and RoboHelp Information
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