I was just playing with this. Hopefully you can see the screenshot at:
https://imgur.com/a/NXePX
Assuming you've already set up the MIDI parameter/learn stuff, then the steps in that screenshot are:
1. Click Param button to show the drop-down menu.
2. Click the option "Parameter modulation/MIDI link". Yeah it looks like a tick option, but it actually launches a top secret "Parameter Modulation/Link..." dialog.
3. In this secret dialog, you can invert and scale the mapped parameter. So to invert it, set the baseline value (first slider at the top) to maximum.
4. Then set the Scale value (last slider at bottom) to -100%. You can now wibble knobs in an anti-wibble fashion.