Show relative path in title bar for when browsing dir recursive

settingsdialog.cpp

@@ -150,10 +150,10 @@ void SettingsDialog::installThumbnailer()
 
     QProcess regsvr;
     int ret = regsvr.execute("regsvr32.exe", {"/s", path});
-    if(ret)
-    {
+    if(ret == 0)
+        QMessageBox::information(this, tr("Thumbnail support"), tr("Thumbnail generation support sucessufully installed."));
+    else
         QMessageBox::critical(this, tr("Error"), tr("Failed to register thumbnailer. %1").arg(ret));
-    }
 #endif
 }