diff --git a/src/gui/application.cpp b/src/gui/application.cpp
index 1ed8ee15bf57d..a92664a45c27c 100644
--- a/src/gui/application.cpp
+++ b/src/gui/application.cpp
@@ -163,6 +163,9 @@ bool Application::configVersionMigration()
     configFile.setLaunchOnSystemStartup(configFile.launchOnSystemStartup());
     Utility::setLaunchOnStartup(theme->appName(), theme->appNameGUI(), configFile.launchOnSystemStartup());
 
+    // default is now off to displaying dialog warning user of too many files deletion
+    configFile.setPromptDeleteFiles(false);
+
     // back up all old config files
     QStringList backupFilesList;
     QDir configDir(configFile.configPath());
diff --git a/src/libsync/configfile.cpp b/src/libsync/configfile.cpp
index 22900c8674cda..f152d2e323610 100644
--- a/src/libsync/configfile.cpp
+++ b/src/libsync/configfile.cpp
@@ -1022,7 +1022,7 @@ bool ConfigFile::showMainDialogAsNormalWindow() const {
 bool ConfigFile::promptDeleteFiles() const
 {
     QSettings settings(configFile(), QSettings::IniFormat);
-    return settings.value(QLatin1String(promptDeleteC), true).toBool();
+    return settings.value(QLatin1String(promptDeleteC), false).toBool();
 }
 
 void ConfigFile::setPromptDeleteFiles(bool promptDeleteFiles)