jlouter: the error means the capx needs a specific (custom) plugin to be opened.
Apparently those examples were made before Ashley implements dialogs that gives the name of the missing plugin(s).
On the first page of this thread you can see this post that links to the required plugin.
I downloaded the plugin that was listed in that post, and still had an issue with trying to open the capx like jlouter mentioned.
I also have an alternative shuffle in case anyone would like it:
<img src="http://i91.photobucket.com/albums/k286/seridras/DealDraw.png" border="0">
This should address the issue mentioned above for incomplete shuffling.