All, Thanks to advice from Alison Walker from Frontier Precision the issue was quickly corrected. Not surprisingly the problem was the nut behind the wheel. AKA me. Even though I've been using Arc for years I only set the customize flag for the toolbar .. and forgot to do it for the extension! Duh.
I'd urge Trimble to add an error message.. "extension is not enabled" for other idiots like me. Alison says the situation is common. Which is more frightening than reassuring.
Thanks to all the community for help. Great group.