If you view the attached screenshot, you will see several DMX units in my configuration. Whenever I launch Toolkit, the Groups on the DMX units displayed "unknown", yet all groups have been previously defined. If I open a unit, all the mapping appear correctly (see lower part of the screen shot). If I select APPLY, the fields fill in correctly and remain displayed until the next time I launch Tookit. I suspect this is a bug in 1.12.1, but could not find any mention of it on the forums, so I thought I would make this post.