Please update your project with the latest ToolbarWrapper.cs

[MaceWe]

Some code that was added to Contract Configurator has exposed a bug in the toolbar reflection wrapper.
http://forum.kerbalspaceprogram.com/index.php?/topic/55420-120-toolbar-1713-common-api-for-draggableresizable-buttons-toolbar/&page=55#comment-2770188

[sswelm]

How is this relevant for PersistantThrust which doesn't seem to use any ToolbarWrapper. I think this issue can be closed