I tried to launch the new frosty mod manager 1.0.6.3 even running as administrator but it showed me this

The given key was not present in the dictionary.

at System.ThrowHelper.ThrowKeyNotFoundException()
at System.Collections.Generic.Dictionary`2.get_Item(TKey key)
at Frosty.Core.Config.get_Item(String option, ConfigScope scope, String profile)
at Frosty.Core.Config.Get[T](String option, T defaultValue, ConfigScope scope, String profile)
at Frosty.Core.FrostyConfiguration..ctor(String profile)
at FrostyModManager.App.Application_Startup(Object sender, StartupEventArgs e)
at System.Windows.Application.OnStartup(StartupEventArgs e)
at System.Windows.Application.<.ctor>b__1_0(Object unused)
at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegat