This is the exception

[EXC 08:13:44.622] InvalidOperationException: Operation is not valid due to the current state of the object
System.Linq.Enumerable.Single[Assembly](IEnumerable1 source, System.Func2 predicate, Fallback fallback)
System.Linq.Enumerable.SingleOrDefault[Assembly](IEnumerable`1 source)
TarsierSpaceTech.TSTInstalledMods.IsModInstalled (System.String assemblyName)
TarsierSpaceTech.TSTInstalledMods.get_IsKopInstalled ()
TarsierSpaceTech.TSTGalaxies.Awake ()
UnityEngine.GameObject:AddComponent(Type)
AddonLoader:StartAddon(LoadedAssembly, Type, KSPAddon, Startup)
AddonLoader:StartAddons(Startup)
AddonLoader:OnLevelWasLoaded(Int32)

Fix in next version.