diff --git a/LibationLauncher/LibationLauncher.csproj b/LibationLauncher/LibationLauncher.csproj
index d71ad236..0c60bf2d 100644
--- a/LibationLauncher/LibationLauncher.csproj
+++ b/LibationLauncher/LibationLauncher.csproj
@@ -13,7 +13,7 @@
     <!-- <PublishSingleFile>true</PublishSingleFile> -->
     <RuntimeIdentifier>win-x64</RuntimeIdentifier>
 
-    <Version>5.5.9.1</Version>
+    <Version>5.5.10.1</Version>
   </PropertyGroup>
 
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|AnyCPU'">
diff --git a/LibationWinForms/Form1.Designer.cs b/LibationWinForms/Form1.Designer.cs
index 18660d36..00917758 100644
--- a/LibationWinForms/Form1.Designer.cs
+++ b/LibationWinForms/Form1.Designer.cs
@@ -216,7 +216,7 @@
 			// 
 			this.convertAllM4bToMp3ToolStripMenuItem.Name = "convertAllM4bToMp3ToolStripMenuItem";
 			this.convertAllM4bToMp3ToolStripMenuItem.Size = new System.Drawing.Size(284, 22);
-			this.convertAllM4bToMp3ToolStripMenuItem.Text = "Convert all M4b to Mp3 [Long-running]";
+			this.convertAllM4bToMp3ToolStripMenuItem.Text = "Convert all M4b to Mp3 [Long-running]...";
 			this.convertAllM4bToMp3ToolStripMenuItem.Visible = true;
 			this.convertAllM4bToMp3ToolStripMenuItem.Click += new System.EventHandler(this.convertAllM4bToMp3ToolStripMenuItem_Click);
 			// 
diff --git a/LibationWinForms/Form1.cs b/LibationWinForms/Form1.cs
index 945204ec..3470741f 100644
--- a/LibationWinForms/Form1.cs
+++ b/LibationWinForms/Form1.cs
@@ -389,7 +389,18 @@ namespace LibationWinForms
 			=> await BookLiberation.ProcessorAutomationController.BackupAllPdfsAsync();
 
 		private async void convertAllM4bToMp3ToolStripMenuItem_Click(object sender, EventArgs e)
-			=> await BookLiberation.ProcessorAutomationController.ConvertAllBooksAsync();
+		{
+			var result = MessageBox.Show(
+				"This converts all m4b titles in your library to mp3 files. Original files are not deleted."
+				+ "\r\nFor large libraries this will take a long time and will take up more disk space."
+				+ "\r\n\r\nContinue?"
+				+ "\r\n\r\n(To always download titles as mp3 instead of m4b, go to Settings: Download my books as .MP3 files)",
+				"Convert all M4b => Mp3?",
+				MessageBoxButtons.YesNo,
+				MessageBoxIcon.Warning);
+			if (result == DialogResult.Yes)
+				await BookLiberation.ProcessorAutomationController.ConvertAllBooksAsync();
+		}
 
 		#endregion