Equivalent of Vectric's Trim Vector Tool?

I saw this video (at 3:30) that shows usage of Vectric’s “Trim Vector Tool” and was wondering if Lightburn has an equivalent feature. I saw the Trim Line feature that was added in 9.12 (according to the Feature Suggestion forum), but can’t see how to mimic what I see in the video. I keep ending up with closed vectors rather than the open vector shown in the video. Would someone mind describing how to do this in Lightburn, if possible?

See this tutorial video>. https://youtu.be/1sbK-Dux214

Perfect! Thank you!