Word 2011 for Mac freezes on startup with Endnote X7

I have a Mac running Yosemite. I have been running Word 2011 on it, and have recently purchased Endnote X7. I installed Endnote, and when I start Word I get an error message to the effect that Word cannot start Visual Basic for Applications, and the entire application is frozen, and I have to force quit Word.

I have gone through these boards and have tried the suggestions that seemed to be even partly relevant, but nothing has worked.

The really odd thing is that I had this identical problem on another Mac I run, also running Yosemite, and after much hand-wringing and hair-pulling I figured out and corrected the issue. Although I seem to remember it was a simple thing, I cannot for the life of me remember what I did to fix it. Can anyone help?

Call tech support?  These are the kind of things that they are paid to figure out and calling is your best option.