Upgrade to Godot 4.4.

Views/MainView.tscn

@@ -1,16 +1,16 @@
-[gd_scene load_steps=17 format=3 uid="uid://cr2f68sbsegai"]
+[gd_scene load_steps=16 format=3 uid="uid://cr2f68sbsegai"]
 
 [ext_resource type="Theme" uid="uid://b8rk41gjual2b" path="res://Assets/DefaultTheme.tres" id="1_s6hk6"]
-[ext_resource type="Script" path="res://addons/dockable_container/dockable_container.gd" id="2_7b0h5"]
-[ext_resource type="Script" path="res://Scripts/NestablePopupMenu.gd" id="2_lsrne"]
+[ext_resource type="Script" uid="uid://mw1o44i8qxmk" path="res://addons/dockable_container/dockable_container.gd" id="2_7b0h5"]
+[ext_resource type="Script" uid="uid://cscqkg5w0nqaf" path="res://Scripts/NestablePopupMenu.gd" id="2_lsrne"]
 [ext_resource type="Texture2D" uid="uid://vd53o7va0tni" path="res://Assets/Icons/tracks.svg" id="2_nidjn"]
 [ext_resource type="Texture2D" uid="uid://dxl2qel0qbxrn" path="res://Assets/Icons/mixer.svg" id="3_4tblp"]
-[ext_resource type="Script" path="res://addons/dockable_container/layout_panel.gd" id="3_4twnq"]
-[ext_resource type="Script" path="res://addons/dockable_container/layout.gd" id="4_ixaqo"]
+[ext_resource type="Script" uid="uid://otsc040yabxa" path="res://addons/dockable_container/layout_panel.gd" id="3_4twnq"]
+[ext_resource type="Script" uid="uid://sgl6svfbs2v6" path="res://addons/dockable_container/layout.gd" id="4_ixaqo"]
 [ext_resource type="PackedScene" uid="uid://bgh1og6p43lsp" path="res://Controls/Transport.tscn" id="5_aq6v8"]
 [ext_resource type="PackedScene" uid="uid://bpd6g2b3s7tqa" path="res://Views/TrackView.tscn" id="5_rgxdu"]
 [ext_resource type="PackedScene" uid="uid://v4oljx3qrk5q" path="res://Views/Timeline.tscn" id="7_xu70y"]
-[ext_resource type="Script" path="res://Source/ProjectController.cs" id="11_gc3ui"]
+[ext_resource type="Script" uid="uid://dtomx04m445em" path="res://Source/ProjectController.cs" id="11_gc3ui"]
 
 [sub_resource type="Resource" id="Resource_pfnfv"]
 resource_name = "Tabs"
@@ -36,9 +36,6 @@ script = ExtResource("4_ixaqo")
 root = SubResource("Resource_xnlko")
 hidden_tabs = {}
 
-[sub_resource type="StyleBoxFlat" id="StyleBoxFlat_3f3qp"]
-bg_color = Color(0.180005, 0.180005, 0.180005, 1)
-
 [node name="MainView" type="Control"]
 layout_mode = 3
 anchors_preset = 15
@@ -59,12 +56,12 @@ grow_vertical = 2
 [node name="MenuBar" type="MenuBar" parent="VBoxContainer"]
 layout_mode = 2
 size_flags_horizontal = 3
-theme_override_font_sizes/font_size = 13
 flat = true
 
 [node name="File" type="PopupMenu" parent="VBoxContainer/MenuBar"]
 item_count = 3
 item_0/text = "New..."
+item_0/id = 0
 item_1/text = "Open..."
 item_1/id = 1
 item_2/id = 2
@@ -75,12 +72,14 @@ script = ExtResource("2_lsrne")
 auto_translate_mode = 1
 item_count = 2
 item_0/text = "Audio Clip"
+item_0/id = 0
 item_1/text = "Label Clip"
 item_1/id = 1
 
 [node name="Export" type="PopupMenu" parent="VBoxContainer/MenuBar/File"]
 item_count = 2
 item_0/text = "Project"
+item_0/id = 0
 item_1/text = "Region"
 item_1/id = 1
 
@@ -88,6 +87,7 @@ item_1/id = 1
 auto_translate_mode = 1
 item_count = 2
 item_0/text = "Add Audio Track"
+item_0/id = 0
 item_1/text = "Add Label Track"
 item_1/id = 1
 
@@ -99,6 +99,7 @@ item_0/text = "Tracks"
 item_0/icon = ExtResource("2_nidjn")
 item_0/checkable = 1
 item_0/checked = true
+item_0/id = 0
 item_1/text = "Mixer"
 item_1/icon = ExtResource("3_4tblp")
 item_1/checkable = 1
@@ -110,6 +111,7 @@ auto_translate_mode = 1
 hide_on_checkable_item_selection = false
 item_count = 2
 item_0/text = "Project Settings"
+item_0/id = 0
 item_1/text = "System Settings"
 item_1/id = 1
 
@@ -122,6 +124,7 @@ anchor_bottom = 1.0
 grow_horizontal = 2
 grow_vertical = 2
 mouse_filter = 2
+theme_type_variation = &"MenuBarPanel"
 
 [node name="VSplitContainer" type="VSplitContainer" parent="VBoxContainer"]
 layout_mode = 2
@@ -129,6 +132,7 @@ size_flags_vertical = 3
 
 [node name="Transport" parent="VBoxContainer/VSplitContainer" instance=ExtResource("5_aq6v8")]
 layout_mode = 2
+size_flags_horizontal = 1
 
 [node name="HSplitContainer" type="HSplitContainer" parent="VBoxContainer/VSplitContainer"]
 layout_mode = 2
@@ -178,7 +182,6 @@ anchor_bottom = 1.0
 grow_horizontal = 2
 grow_vertical = 2
 mouse_filter = 2
-theme_override_styles/panel = SubResource("StyleBoxFlat_3f3qp")
 
 [node name="ProjectController" type="Node" parent="."]
 script = ExtResource("11_gc3ui")

Views/Timeline.tscn

@@ -1,6 +1,6 @@
 [gd_scene load_steps=3 format=3 uid="uid://v4oljx3qrk5q"]
 
-[ext_resource type="Script" path="res://Scripts/Timeline.gd" id="1_h2mev"]
+[ext_resource type="Script" uid="uid://2t7cikq15q48" path="res://Scripts/Timeline.gd" id="1_h2mev"]
 [ext_resource type="PackedScene" uid="uid://dmmgalpx4fcc7" path="res://Controls/AudioClip.tscn" id="2_an2hv"]
 
 [node name="Timeline" type="Container"]

Views/TrackView.tscn

@@ -52,5 +52,6 @@ flat = false
 icon_alignment = 1
 item_count = 2
 popup/item_0/text = "Audio Track"
+popup/item_0/id = 0
 popup/item_1/text = "Label Track"
 popup/item_1/id = 1