Unity 5.5.0p3 SteamVR_Settings keeps running and causing studdering in editor.

Force show is NOT set to true.

I keep getting the following messages:
Deleting Plugins/x86_64/openvr_api.dll
UnityEngine.Debug:Log(Object)
SteamVR_Settings:Update() (at Assets/SteamVR/Editor/SteamVR_Settings.cs:167)
UnityEditor.EditorApplication:Internal_CallUpdateFunctions()

Plugins/x86_64/openvr_api.dll in use; cannot delete. Please restart Unity to complete upgrade.
UnityEngine.Debug:Log(Object)
SteamVR_Settings:Update() (at Assets/SteamVR/Editor/SteamVR_Settings.cs:170)...

Unity 5.5.0p3 SteamVR_Settings keeps running and causing studdering in editor.