[Plugin: jQuery Colorbox] Not working after update

Hi I have been using jQuery Colorbox without a problem for the last year. I have just installed the latest update and it is no longer working. I am using in sidebar text widgets with links like this:

<dl class="services">
<a class="colorbox-link" href="xxx" ><dt class="remedial"> Massage</dt></a>
<dd class="price">1 hour  ￡25</dd>
<dd class="desc">Massage description here.<a class="colorbox-link" href="xxx">Read More...</a><dd>

I am linking to html files and never had a problem until now.
Anyone know what’s happened or how I can get it back?
Thanks

https://www.ads-software.com/extend/plugins/jquery-colorbox/