Projucer: Added warning about in-place autoupdating on Windows

extras/Projucer/Source/Application/jucer_AutoUpdater.cpp

@@ -269,7 +269,8 @@ void LatestVersionCheckerAndUpdater::askUserForLocationToDownload (const Version
 
             if (! AlertWindow::showOkCancelBox (AlertWindow::WarningIcon, "Overwrite Existing JUCE Folder?",
                                                 "Do you want to replace the folder\n\n" + targetFolderPath + "\n\nwith the latest version from juce.com?\n\n"
-                                                "This will move the existing folder to " + targetFolderPath + "_old."))
+                                                "This will move the existing folder to " + targetFolderPath + "_old.\n\n"
+                                                "Replacing the folder that contains the curently running Projucer executable may not work on Windows."))
             {
                 return;
             }