Version 2.1.01 Bug Report: Can't Change Design Units to Metric (mm)

Under Laser Tools>Device Settings>Dimensions/Units, I have the same settings I’ve always had when I first set up my ThunderLaser Nova 100W CO2 laser 5 years ago. I never change these settings:

I did come across another thread from a few days ago with the same unresolved issue with a guying running LightBurn 2.1.01 on a PC laptop: