Product description, section "Key Features"
Compatible with any 3rd party Joomla component that includes smart search plugins
Documentation, section "How does it work"
Note that only the content of the components that include a Smart Search plugin will be scanned and indexed
The component is a complete make-over of the default Smart Search component,
with an AJAX driven engine, custom filters/filter groups and new front-end template.
The default Smart Search is a mess actually. The template is awful, the user interface is outdated and you have no control over filters.
I have no problem giving you a refund, it's perfectly fine, no questions asked.
I'm just curious, when you purchased the product, did you think that it will index all content, even without Smart Search plugins?
If yes, then maybe it's partly my fault, as the info is not clear enough in the product description and documentation.