I’m hopeful that Lightburn will introduce a centerline trace, or some other option, in the trace mode so when I trace an image, especially an image with dozens of interior items/graphics/lines – I end up with only a single line trace. It’s OK to trace when I’m just dealing with one item that has nothing in the middle because I can always ungroup and then delete one of the outline trace lines, but when there are multiple items within a graphic and I want to trace it, I only want a single line trace, or as it’s being referred to, a centerline option. In researching I see that it is being worked on while in the trace mode and there may be an ability for set line and set line adjustment settings. My only workaround now is to do the trace blow up the result, and then ungroup and delete all the interior double line traces. But it takes a lot of work and effort and not everything is exact. If it could just only trace an image resulting in a single line in that double lines that would be fantastic. I hope this is an option that’s going to be forthcoming very quickly.
You can add your vote for a centerline trace feature here: [Trace] Center line option · LightBurn
We will probably get centerline trace when Millmage gets vcarve. I think it is one in the same.
I have no idea what either of those are. I think they might be CNC related, that’s my best guess.
You might try this tool created by @NicholasL as a temporary solution.
yes, MillMage and Vcarve are CNC mill related.
Inkscape also has a very good ‘Centerline Tracing’ mode in its ‘Path>Trace Bitmap’ tool as described here:
Tracing an Image — Inkscape Beginners' Guide 1.3 documentation
My ‘Centerline Extraction Tool’ (a personal project), is likely slower than the Inkscape tool, but you are more than welcome to try it 
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I tried it using half dozen or so images to convert to centerline drawings and it’s all discombobulated. I tried all different settings on every file and it’s just not coming up right. Can only hope that Lightburn it’s this option because it’s something that should occur when you say trace, not double line trace. Appreciate the info anyway.
Sometimes you have to bite the bullet and rebuild the images manually. Post your images to reveal their complexity.
I know exactly what you mean. Once you de-discombobulate a few, it gets a lot easier. Playing with Gamma during Trace helps sometimes.
Like @RalphU mentioned, post some of the images and let the Mind Hive have a go at them.