I am not sure if your file got overwritten or ?? . I still see this path for that image <img id="ProductImage" class="WADAResultThumb" border="0" src="webassist/plugins/catalog/scripts">
We also added this product and the image does not appear for this or any new products we add. Additionally a new problem arose, the update products is not working. Just a heads up, I will open another ticket for this. I tried replacing webassist/WA_DataAssist/WA_AppBuilder_PHP.php and that did NOT resolve the issue.