Here is a low and dirty workaround that I sometimes use: Assuming you are using the same materials on a recurrent basis, you can create your own master file for each in the lightburn files folder.
All the master file needs is a single line or character for each colour you use, and the saved settings for each. So five colours/layers, let’s say five circles. Call it master plywood/acrylic/whatever and save it.
Next time you OPEN the master file for that material, then IMPORT your new design, then delete the five circles, position etc your new design as usual and SAVE AS the new file name that you choose.
Not an elegant solution I do confess, just a workaround from an older geezer who has occasionally been privileged enough to make other older geezers feel positively warm and fuzzy inside…