There are some fundamental differences between your document and the one the code discussed in the linked thread are for. These include:
• the use of content controls, whereas your document uses formfields;
• uniform table layouts, whereas your document has tables with merged cells spanning multiple rows and, in one case, a column that isn't even the full table height.
The existing macro couldn't be modified to work with your document - an entirely new one would be required.

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Cheers,
Paul Edstein
[Fmr MS MVP - Word]