non-secure http content

[*kazumi*]

I have been using Pretty Borders Plus! to make templates for my listings.  Yesterday I was told the borders are "non-secure http content" and my listing will be removed if I do not fix it.  I just took it out.  How can I fix it?  One of my listing at least let me put some photos into the "description" area, but the others did not  😞  Is there anywhere to get some templates that can be used on eBay now?

First Photobucket started demanding hundreds of dollars, now this.  ETSY is starting to look attractive.