The both links you sent pointed to products category not to the demo pages, so i could not see the demos you are talking about.
This is the message i got after purchase
"Hi Michael
The file(s) you ordered are ready for your download. Before download files, please register your domain to our domain list here
www.smartaddons.com/my-domains/2 , this will help us to manage your license and answer your questions priority.
Please enter the following Download-ID(s) in our Downloads Area:
mod_sj_content_categories_UNZIPFIRST.zip: 5ec44504179
www.smartaddons.com/index.php?option=com_virtuemart&page=shop.downloads&Itemid=338&download_id=5ec44504179463"
the maximum number of downloads for each file is: 5
Download until 90 days after the first download
That is the link i was given to download, note i removed some digits from the download id
This is the second message
"Hi Michael,
the Status of your Order No. 16097 has been changed.
New Status is:
____________________________________________________________
Confirmed
____________________________________________________________
To view the Order Details, please follow this link (or copy it into your browser):
www.smartaddons.com/index.php?option=com_virtuemart&page=account.order_details&order_id=16097&Itemid=338"
I want sj-content-categories-II or can i ask for refund because it's totally useless to have sj-content-categories since it does not work.