Overlay default values if it doesn't exist

Craftimizer/Configuration.cs

@@ -1,5 +1,6 @@
 using Craftimizer.Simulator.Actions;
 using Craftimizer.Solver;
+using Craftimizer.Utils;
 using Dalamud.Configuration;
 using Newtonsoft.Json;
 using System;
@@ -84,7 +85,9 @@ public class Configuration : IPluginConfiguration
     public IReadOnlyList<Macro> Macros => macros;
     public int ReliabilitySimulationCount { get; set; } = 500;
     public bool ConditionRandomness { get; set; } = true;
+    [JsonConverter(typeof(PopulateConverter))]
     public SolverConfig SimulatorSolverConfig { get; set; } = SolverConfig.SimulatorDefault;
+    [JsonConverter(typeof(PopulateConverter))]
     public SolverConfig SynthHelperSolverConfig { get; set; } = SolverConfig.SynthHelperDefault;
     public bool EnableSynthHelper { get; set; } = true;
     public bool ShowOptimalMacroStat { get; set; } = true;

Craftimizer/Utils/PopulateConverter.cs

@@ -0,0 +1,22 @@
+using Newtonsoft.Json;
+using System;
+
+namespace Craftimizer.Utils;
+
+public class PopulateConverter : JsonConverter
+{
+    public override bool CanConvert(Type objectType) =>
+        objectType.GetConstructor(Type.EmptyTypes) != null;
+
+    public override object? ReadJson(JsonReader reader, Type objectType, object? existingValue, JsonSerializer serializer)
+    {
+        existingValue ??= Activator.CreateInstance(objectType) ?? throw new ArgumentException($"Could not create object of type {objectType}", nameof(objectType));
+        serializer.Populate(reader, existingValue);
+        return existingValue;
+    }
+
+    public override void WriteJson(JsonWriter writer, object? value, JsonSerializer serializer)
+    {
+        serializer.Serialize(writer, value);
+    }
+}