.lbrn2 thumbnails not showing in Windows Explorer (LightBurn 2.0.20)

LightBurn Software Questions OS Specific
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Hi LightBurn team,

I’ve been trying to get .lbrn2 files to show thumbnails in Windows Explorer (instead of just the generic LightBurn icon), but so far nothing works — even after following all the known steps.

Here’s what I’ve confirmed:

  • I’m using LightBurn v2.0.20 (Windows 64-bit)
  • The file LightBurnThumbnailHandler.dll is present in C:\Program Files\LightBurn
  • I’ve successfully registered it using regsvr32 (no errors)
  • Thumbnail previews for images like .jpg or .png work fine in Explorer
  • I’ve cleared the Windows thumbnail cache, restarted Explorer, and double-checked that “Always show icons, never thumbnails” is unchecked
  • Even using .lbrn2 files that I just saved, I still only see the standard LightBurn icon

I also checked the Settings panel in LightBurn, and I don’t see any option to include or enable preview images when saving projects. Was this feature removed? Or is there something I’m missing?

Thanks in advance for your help — I’d really love to have thumbnails working again!

Best regards,
Nicolas

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