Hi!
I have found the problem, there was an issue in both the configuration, and within the plugin as well:
1. The custom field values are stored with apostrophes, so I made the following change: http://i.imgur.com/qPKNH0o.png
2. It was still not working, because of an extra safety method that was not functioning correctly, and added too many extra slash characters to escape the quote ” ‘ ” mark. I have installed a quick fix version of the plugin for you, so it fixed the issue.
It should be working correctly now. I will make sure to include this fix in the upcoming release, so you won’t have to worry about it anymore, when you update.