Detects units of measurement in your blog text and automatically displays the metric or US customary equivalent in one of several possible ways.
As there is no options page (yet), you will need to edit the
/wp-content/plugins/unit-converter.php file around line 31 and change:
$display_mode = 'mouseover';
$display_mode = 'parentheses';
I'm not sure because I haven't tested it on anything earlier. If you use an earlier version and it works, let me know!
It's time to move forward. See GoPHP5.org for more.