Thanks for responding. Unfortunately, the plugin didn’t work. I installed it and it no longer shows the map link markup. Instead, it just shows a blank area with the View Larger Map link at the bottom.
However, looking at this, I now see what is happening. The [googlemap] tag is a code that is supported on wordpress.com but not in the wordpress software on my site.
Looks like I’ll just need to go and edit each link by hand.