Rated 5 out of 5 stars
For those who are looking for a FFx 3.6 upgrade, and are okay modifying the install.rdf, the best thing to do is uninstall, change both the FFx version, as well as the addon version, and re-install.
Or, you could get my copy "Show Anchors v2.3" at:
I love this extension. It's not pretty, it does stuff I'll never need, but it does what I need it to do perfectly. I just need to send someone a link that points to the named anchor, so they don't have to find what part of the page I'm referencing.