Good that you found it.
BTW, whats very helpful to check your routing in terms of monitoring:
1. ensure you are in submix mode (upper right, blue area)
2. select the Hardware Output for monitoring
3. click to the button sub on the right side of TM FX (at Layout Presets)
Then you only see those HW inputs (top row) and SW playbacks (middle row, audio from computer/DAW)
that route into selected HW Output (aka "submix").
TM FX Monitoring Submix before clicking "sub"
https://www.dropbox.com/scl/fi/cztr337l … h&dl=1

TM FX Monitoring Submix after clicking "sub"
https://www.dropbox.com/scl/fi/qlrx885u … p&dl=1

Blog Article about saving and restoring the TM FX workspace / config
I assume, if you are anxious to mess up your settings, then you do not seem to use Workspaces and Quick Workspace Select
to backup / restore your setup (TM FX routing, window position, etc).
I can change whatever I want (to try) and bring the previous state back using the key combination ALT-1
to restore the first Workspace Quick Select config (from in total 30 Quick Workspace Select Slots).
I wrote a blog article about that topic which could be of good help to you, to get more "safety" in, so that you can try new things in a more relaxed way. As the restore can be achieved in below 1 second by using a key combination ALT-n (n=1..9).
https://www.tonstudio-forum.de/blog/ent … kup-en-de/
I hope this helps additionally for much easier stress free operation.
BR Ramses - HDSPe MADI FX, M-1620 Pro D, 12Mic, UFX III, ADI-2 Pro FS R BE, Nuendo 15, Win10 IoT Ent