Managed to fix it – for anyone else that wants to reduce the database queries and speed up this module go to modulesmod_janews and open up mod_janews.xml then scroll down and find <params> add this code straight after (you’ll see the other params) and save:
<param name="cache" type="radio" default="0" label="Enable Cache" description="Select whether to cache the content of this module">
<option value="0">No</option>
<option value="1">Yes</option>
</param>
Then in your admin panel go to modules find ja news and you’ll see you now have the option to cache this module. For me it’s reduced the queries from 345 to a mere 12.