I am using a JTech 7w laser on a Millright MegaV. Lightburn v9.16 connects automatically without any issues. I next upgraded directly to v9.19. That version will not connect to the machine at all. Updating to v9.20 did not help and the problem persisted. Reinstalling v9.16 allowed me to use the machine again.
I do not know if v9.17 or v9.18 works because I never tried those.
What is causing the updated versions to fail and how can I fix it? Thanks.