Fix querying of explorer window

Author: stefnotch

Flow.Launcher/Helper/FileExplorerHelper.cs

@@ -44,7 +44,8 @@ private static dynamic GetActiveExplorer()
 
                 // find the desired window and make sure that it is indeed a file explorer
                 // we don't want the Internet Explorer or the classic control panel
-                if (Path.GetFileName((string)window.FullName) == "explorer.exe" && new IntPtr(window.HWND) == handle)
+                // ToLower() is needed, because Windows can report the path as "C:\\Windows\\Explorer.EXE"
+                if (Path.GetFileName((string)window.FullName).ToLower() == "explorer.exe" && new IntPtr(window.HWND) == handle)
                 {
                     return window;
                 }
@@ -53,8 +54,6 @@ private static dynamic GetActiveExplorer()
             return null;
         }
 
-        // COM Imports
-
         [DllImport("user32.dll")]
         private static extern IntPtr GetForegroundWindow();
     }