Fix crash in Godot 4.5.1 due to dialogic duplicate autoload registration

addons/dialogic/plugin.cfg

@@ -5,4 +5,5 @@ description="Create dialogs, characters and scenes to display conversations in y
 https://github.com/dialogic-godot/dialogic"
 author="Jowan Spooner, Emi, Cake and more!"
 version="2.0-Alpha-19 WIP (Godot 4.3+)"
+godot_version="4.5"
 script="plugin.gd"

addons/dialogic/plugin.gd

@@ -19,52 +19,46 @@ func _init() -> void:
 #region ACTIVATION & EDITOR SETUP
 ################################################################################
 
-## Activation & Editor Setup
-func _enable_plugin() -> void:
-	add_autoload_singleton(PLUGIN_NAME, PLUGIN_HANDLER_PATH)
-	add_dialogic_default_action()
-
-
-func _disable_plugin() -> void:
-	remove_autoload_singleton(PLUGIN_NAME)
-
-
+## Called when the plugin is activated in the editor.
+## Sets up the main editor interface and inspector plugin.
 func _enter_tree() -> void:
+	# Add default input action for Dialogic
+	add_dialogic_default_action()
+
+	# Setup main editor view
+	# Use call_deferred to ensure editor_main_screen is ready in Godot 4.5+
 	editor_view = MainPanel.instantiate()
 	editor_view.plugin_reference = self
 	editor_view.hide()
-	get_editor_interface().get_editor_main_screen().add_child(editor_view)
+	call_deferred("_add_main_panel_to_editor", editor_view)
 	_make_visible(false)
-
+
+	# Setup inspector plugin
 	inspector_plugin = load("res://addons/dialogic/Editor/Inspector/inspector_plugin.gd").new()
 	add_inspector_plugin(inspector_plugin)
 
-	# Auto-update the singleton path for alpha users
-	# TODO remove at some point during beta or later
-	if not ProjectSettings.has_setting("autoload/"+PLUGIN_NAME) or not "Core" in ProjectSettings.get_setting("autoload/"+PLUGIN_NAME, ""):
-		if ProjectSettings.has_setting("autoload/"+PLUGIN_NAME):
-			remove_autoload_singleton(PLUGIN_NAME)
-		add_autoload_singleton(PLUGIN_NAME, PLUGIN_HANDLER_PATH)
+
+## Helper function to safely add main panel to editor interface
+## Deferred to ensure editor_main_screen is ready in Godot 4.5+
+func _add_main_panel_to_editor(panel: Control) -> void:
+	var main_screen := get_editor_interface().get_editor_main_screen()
+	if main_screen:
+		main_screen.add_child(panel)
 
 
+## Called when the plugin is deactivated in the editor.
+## Cleans up the editor interface.
 func _exit_tree() -> void:
 	if editor_view:
-		remove_control_from_bottom_panel(editor_view)
+		if editor_view.get_parent():
+			editor_view.get_parent().remove_child(editor_view)
 		editor_view.queue_free()
-
+	
 	if inspector_plugin:
 		remove_inspector_plugin(inspector_plugin)
 
 #endregion
 
-
-#region PLUGIN_INFO
-################################################################################
-
-func _has_main_screen() -> bool:
-	return true
-
-
 func _get_plugin_name() -> String:
 	return PLUGIN_NAME