[Plugin: WP Testimonial Widget] Displaying featured images through shortcode

Hello!
This plugin uses a listing template for displaying testimonials. The fields get displayed using the following format, surrounded by div tags, for example:

{#ProjectName}
{#ClientName}
{#City}

On the post (“testimonial”) editor page, you can also upload a thumbnail image, it gets the field:

{#ThumbImgUrl}

Here is a screenshot of what this all looks like: HERE

The problem is, when viewing the page, each field displays its data except the image fields. They actually display the url path to the image, but not the image itself

See this screen shot:
“>HERE

So my question is, what are these: {…}, and how do I get it to display the image like the other ones instead of the url path itself?

A little lost… thank you for any help!