glad it works for you too Mark!
Now, what you can do to be prepared for future plugin updates is to add something in front of the description (line 5) of the same file. Some thing like:
Description: <strong>*** CHANGE LINE 153 INTO MANAGE_LINKS TO ENABLE SITEOWNERS TO MASS EDIT METADATA ***</strong> Meta-data manager on steroids, allowing complete control over all SEO needs such as keywords/tags, titles, description, stylesheets, and many many other goodies. (I use manage_links, because I have given site owners a separate role, but you can use any "flavor")
Once you have saved it again, you will see a change of the plugins description in your plugins list. Just to remember you to change it again when the plugin sees an update.