While active, vorpX will hook anything that initializes DirectX. This is by design and enables vorpX to also work with many games that are not officially supported.
You can simply pause the vorpX watcher from the tray icon (right click, then choose “Pause Watcher”). Alternatively you can also exit vorpX Control completely when you don’t want it to be active. The third option you have is to add programs to the exclude list in th vorpX config app.