For a week now, when I use the "Auto-tag references in HTML" tool and select NIV84 for the version, the actual links produced are to the ESV.
Example:
Ep2.8-10
produces
<a href="http://biblia.com/bible/esv/Ep2.8-10" class="lbsBibleRef" data-reference="Ep2.8-10" data-version="esv">Ep2.8-10</a>
I am using the latest Chrome browser.