My preferences would be:
1. Move the Kind, Action, and Database icons to the top of the Kind column.
2. Move the Stop/Refresh icon from the right hand side of the screen to the left.
3. A right click menu available when Select Mode is in operation so kinds can be selected/created without having to go back over to the Kind column icons.
4. Currently, I'm seeing multiple selections seem to happen after I select something and move to add a kind. It's visual only, they're not really selected, but sometimes the whole screen turns purple. Makes me nervous....
This is a wonderful app!