Basic Sizes not able to restore to Default

after experimenting with 1mm units of measure, I am unable to Restore original default sizes of 42mm and height of 7mm. I can select these measurements, but they will not save and now I am unable to Generate any Bins. The baseplate generator still works fine.

<img width="809" height="766" alt="Image" src="https://github.com/user-attachments/assets/c2bf8e1b-362f-47b7-b516-4ecde1f447fd" />