See http://helpx.adobe.com/x-productkb/global/error-signed-distributor-mac -os.html for steps to resolve the issue.
Neil
This is due to a feature called gatekeeper introduced in Mountain Lion which prevents applications download outside of App store or some other known applications list to install. To install DPS tools, temporarily turn off gatekeeper and after your install the Folio Builder, turn it back on.
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