- The new version keeps the original layout intact, and adds an additional button to the right. The rightmost button now opens up a "nest editor". and it is completely optional.
- The nest editor does not allow empty rows.
- Both directory selectors now show the existing assemblies in their places pane.
As a side note: IMO ArrayCtrl needs an IsEmpty() method (for coherency and convenience). Is there any rationale behind not implementing it?