diff --git a/Flow.Launcher/ViewModel/SelectBrowserViewModel.cs b/Flow.Launcher/ViewModel/SelectBrowserViewModel.cs
index f75a0ef8b..e3a0e4e44 100644
--- a/Flow.Launcher/ViewModel/SelectBrowserViewModel.cs
+++ b/Flow.Launcher/ViewModel/SelectBrowserViewModel.cs
@@ -17,6 +17,8 @@ public partial class SelectBrowserViewModel : BaseModel
         get => selectedCustomBrowserIndex;
         set
         {
+            // When one custom browser is selected and removed, the index will become -1, so we need to ignore this change
+            if (value < 0) return;
             if (selectedCustomBrowserIndex != value)
             {
                 selectedCustomBrowserIndex = value;
diff --git a/Flow.Launcher/ViewModel/SelectFileManagerViewModel.cs b/Flow.Launcher/ViewModel/SelectFileManagerViewModel.cs
index 253f74b47..b0851b90c 100644
--- a/Flow.Launcher/ViewModel/SelectFileManagerViewModel.cs
+++ b/Flow.Launcher/ViewModel/SelectFileManagerViewModel.cs
@@ -21,6 +21,8 @@ public partial class SelectFileManagerViewModel : BaseModel
         get => selectedCustomExplorerIndex;
         set
         {
+            // When one custom file manager is selected and removed, the index will become -1, so we need to ignore this change
+            if (value < 0) return;
             if (selectedCustomExplorerIndex != value)
             {
                 selectedCustomExplorerIndex = value;