[Plugin: Twitter Mentions As Comments] Plugin isn't finding Tweets, not even my own

I thought the plugin would at least pick up my own tweets with links from 2 weeks ago, but I’m getting the “No Tweets found” message.

How far back in time does the plugin check for tweets with a link to your site? I’d like to know if the plugin is malfunctioning, or if this is just the way the plugin functions (detecting new tweets only). Thx.

https://www.ads-software.com/extend/plugins/twitter-mentions-as-comments/