bug fix #441 -- new code with empty setting

Source/AppScaffolding/AppScaffolding.csproj

@@ -2,7 +2,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <TargetFramework>net7.0</TargetFramework>
-    <Version>8.8.1.1</Version>
+    <Version>8.8.2.1</Version>
   </PropertyGroup>
   <ItemGroup>
     <PackageReference Include="Octokit" Version="4.0.3" />

Source/LibationFileManager/Configuration.PersistentSettings.cs

@@ -128,16 +128,16 @@ namespace LibationFileManager
 		[Description("Lame target VBR quality [10,100]")]
 		public int LameVBRQuality { get => GetNonString<int>(); set => SetNonString(value); }
 
-		[Description("A Dictionary of GridView data property names and bool indicating its column's visibility in ProductsGrid")]
-		public Dictionary<string, bool> GridColumnsVisibilities { get => GetNonString<EquatableDictionary<string, bool>>().Clone(); set => SetNonString(value); }
+        [Description("A Dictionary of GridView data property names and bool indicating its column's visibility in ProductsGrid")]
+        public Dictionary<string, bool> GridColumnsVisibilities { get => GetNonString<EquatableDictionary<string, bool>>()?.Clone() ?? new(); set => SetNonString(value); }
 
-		[Description("A Dictionary of GridView data property names and int indicating its column's display index in ProductsGrid")]
-		public Dictionary<string, int> GridColumnsDisplayIndices { get => GetNonString<EquatableDictionary<string, int>>().Clone(); set => SetNonString(value); }
+        [Description("A Dictionary of GridView data property names and int indicating its column's display index in ProductsGrid")]
+        public Dictionary<string, int> GridColumnsDisplayIndices { get => GetNonString<EquatableDictionary<string, int>>()?.Clone() ?? new(); set => SetNonString(value); }
 
-		[Description("A Dictionary of GridView data property names and int indicating its column's width in ProductsGrid")]
-		public Dictionary<string, int> GridColumnsWidths { get => GetNonString<EquatableDictionary<string, int>>().Clone(); set => SetNonString(value); }
+        [Description("A Dictionary of GridView data property names and int indicating its column's width in ProductsGrid")]
+        public Dictionary<string, int> GridColumnsWidths { get => GetNonString<EquatableDictionary<string, int>>()?.Clone() ?? new(); set => SetNonString(value); }
 
-		[Description("Save cover image alongside audiobook?")]
+        [Description("Save cover image alongside audiobook?")]
 		public bool DownloadCoverArt { get => GetNonString<bool>(); set => SetNonString(value); }
 
 		[Description("Download clips and bookmarks?")]

Source/LibationFileManager/Configuration.PropertyChange.cs

@@ -11,7 +11,8 @@ namespace LibationFileManager
 		 */
 		private class EquatableDictionary<TKey, TValue> : Dictionary<TKey, TValue>
 		{
-			public EquatableDictionary(IEnumerable<KeyValuePair<TKey, TValue>> keyValuePairs) : base(keyValuePairs) { }
+			public EquatableDictionary() { }
+            public EquatableDictionary(IEnumerable<KeyValuePair<TKey, TValue>> keyValuePairs) : base(keyValuePairs) { }
 			public EquatableDictionary<TKey, TValue> Clone() => new(this);
 			public override bool Equals(object obj)
 			{