Hi! After the whole Unity debacle,  I've been upgrading the Dialogue Visual Editor to be able to save projects and import them into other engines that use C#, especially Godot. For that, I've used Newtonsoft.Json to serialize the SavedData class into a JSON. So now you have the option to save it with Unity serializer or Newtonsoft's one!

Also, is retrocompatible! You can load a Unity serialized JSON and save it as a Newtonsoft one and vice-versa.

The only extra step is adding Newtonsoft.JSON to your project and a custom serialization binding when deserializing. This is an example for godot.

using Godot;
using System;
using System.Collections.Generic;
using Newtonsoft.Json;
using Newtonsoft.Json.Serialization;
public static class JsonSerialization
{
     private static JsonSerializerSettings SerializerSettings => new JsonSerializerSettings()
     {
         ReferenceLoopHandling = ReferenceLoopHandling.Ignore,
         TypeNameHandling = TypeNameHandling.All,
         Formatting = Formatting.Indented,
         SerializationBinder = new MySerializationBinder()
     };
      
     public static SavedData ReadJson(string json)
     {
         string storyJson = FileAccess.Open(json, FileAccess.ModeFlags.Read).GetAsText();
         return JsonConvert.DeserializeObject<saveddata>(storyJson, SerializerSettings);
     }
}
public class MySerializationBinder : DefaultSerializationBinder {
     public override Type BindToType(string assemblyName, string typeName)
     {
         switch(typeName)
         {
             case "SavedData": return typeof(SavedData);
             case "NodeData": return typeof(NodeData);
             case "LineData": return typeof(LineData);
             case "DialogueLineData": return typeof(DialogueLineData);
             case "ActionLineData": return typeof(ActionLineData);
             case "GoToLineData": return typeof(GoToLineData);
             case "ConditionalType": return typeof(ConditionalType);
             case "ConditionalLineData": return typeof(ConditionalLineData);
             case "ChoiceData": return typeof(ChoiceData);
             case "System.Collections.Generic.List`1[[NodeData, Assembly-CSharp]]": return typeof(List<nodedata>);
             case "System.Collections.Generic.List`1[[LineData, Assembly-CSharp]]": return typeof(List<linedata>);
             case "System.Collections.Generic.List`1[[ConditionalLineData, Assembly-CSharp]]": return typeof(List<conditionallinedata>);
             default: return base.BindToType(assemblyName, typeName);
         }
     }
      
     public override void BindToName(Type serializedType, out string assemblyName, out string typeName)
     {
         assemblyName = null;
         typeName = serializedType.Name;
     }
 }

Other additions to the 0.1.7 version:

• The Save button will automatically save with your last saving configuration and override your last save. In case you never saved before, it will ask for a path and default for Newtonsonf serialization.
• The Dialogue Simulator will show errors. Various errors related to invalid conditional comparisons have been added.