There is a manual workaround that I have used if on a PC using the Main QTR Print Screen.
1- Put the quad file in as if going to print
2- Right click on it and you can see the quad ink curve(s) displayed
3- take down key readings from each ink curve (you may need every 5 units if lots of abrupt changes)
4- Then go to the Curve Creator and create using Curve feature on each ink if not easily produced with the other options
5- Save the qidf file and now you can adjust/tweak if needed
Hope this helps… any ideas and suggestions appreciated ?