It would be nice to be able to open, import lightburn files into the current document. Many times I have certain setups and change other parts of the image with files I have already created. Currently I have to save the file I am working on, open the file I want something out of and copy, go back to the original and paste it in…
If the requested feature is not implemented, a work-around is to use Edit, Settings and select File Settings.
Turn off “auto-launch files in running copy of Lightburn.” This will allow a second instance of Lightburn, providing a bit of convenience to closing and re-opening in the process you describe.
For best results to your request, visit the request feature site [Lightburn Feature Request] (https://lightburn.fider.io/) where others can vote on your feature and perhaps get it added to the list of goodies.