I'm using office 2013 and have not encountered this problem. I'm guessing here, but if CAESAR II was installed when you upgraded MS Office, I think the hand-shake between CAESAR II and Office is now invalid.
Uninstall CAESAR II, then reinstall CAESAR II. If that doesn't resolve the issue please file a Support Request on Smart Support and describe the problem there (and reference this thread).
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Regards,
Richard Ay - Consultant