That should not even be possible. vorpX only attaches to games whilt it is running. Only thing I can imagine is that maybe uninstalling it failed. To be sure you can check whether the vorpX program folder (C:\Program Files (x86)\Animation labs\vorpX) is still there and if so delete it.
BTW: You can exit/pause vorpX from its tray icon’s right click menu. If you can’t see the vorpX tray icon, click the small up arrow left of your clock to show hidden tray icons.