Yes of course I read the readme, but if you read it, it just tells you how it works, not how to troubleshoot problems. Or if you are an idiot like me, what you did wrong!
Anyway I fixed the issue, I went to the CC website (the people who make the glue gun effect) and downloaded a free project bundle from them, it showed the effect in use. I was able then to work out how it worked.
My problem was I wasn’t selecting the correct views and I didn’t have much experience of the product….