Hi, I found a little bug in the version 2.9. If you configure resource settings and move a separator to the top of the list of resources ("Move Up" or "Move to Top" button), then an error is generated: [EXC 21:53:39.277] InvalidOperationException: Operation is not valid due to the current state of the object System.Linq.Enumerable.Last[ResourcePosition] (IEnumerable`1 source) KSPAlternateResourcePanel.ARPWindowResourceConfig.DrawWindow (Int32 id) KSPPluginFramework.MonoBehaviourWindow.Dra