"Quick render" was just an additional Render Node with different settings, there was never anything special about it (though that was a common misconception; that's a big reason why we removed it). If you want to have 2 render nodes in your default project, just create a 2nd one after starting up TG for the first time, change its settings to whatever you want (e.g. lower resolution and detail), and then save the TGD and specify it as the new default in Preferences.
- Oshyan