Answered on the MOTUNation.com site (as usual). For suture reference, here 'tis...
"That's a OSX security thing. You can either change the settings altogether in the Security & Privacy preferences or just Control-click on the app and chose Open from the shortcut menu and that will override the security settings for that app."
Done.
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Digital Performer
Mac Pro 8 core 3,1, 20 GB RAM: Mavericks