Thank you for your reply. There is a bug in it which prevents the popup from working - see screen shot attached shows how the image doesn't display. There is a buggy hypertext link instead. The free plugin doesn't have this issue. Could you please help me with this problem.
Also is there any feature on it that allows me to create a popup that slides in without covering the entire page? This plugin seems to take over the entire screen and I've tried all the options I can find to prevent this.