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

[TrooperJJ]

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

[LittleLittleCloud]

Are you posting the issue to the wrong repo,, this repo is related to model builder