I'm not sure what I did, but this plugin never works any more. It's always some error and then it never loads. If I get my hands on the error code the next time I try it, I will edit this post and put it here
EDIT:
!> Exception during plugin script Init: System.NullReferenceException:
at (wrapper managed-to-native) UnityEngine.Object:GetName (UnityEngine.Object)
at UnityEngine.Object.get_name () [0x00000] in <filename unknown>:0
at LFE.HeightMeasurePlugin.GetHeightMeasurePluginForAtom (.Atom atom) [0x00000] in <filename unknown>:0
at LFE.UI.AtomsWithHeightMeasurePlugin () [0x00000] in <filename unknown>:0
at LFE.UI.InitStorables () [0x00000] in <filename unknown>:0
at LFE.UI..ctor (LFE.HeightMeasurePlugin plugin) [0x00000] in <filename unknown>:0
at LFE.HeightMeasurePlugin.Init () [0x00000] in <filename unknown>:0
at MVRPluginManager.CreateScriptController (.MVRPlugin mvrp, DynamicCSharp.ScriptType type) [0x00000] in <filename unknown>:0