To Install QuadtoneRIP Curves:
To install new Piezography curves to use with QTR, you will need to drag and drop the curves (NOT the FOLDER containing the curves, but the individual curves themselves) into the following folder location:

(Windows) C:\ProgramFiles\QuadToneRIP\QuadTone(Your Printer Model)

(Mac) /Applications/Piezography/Curves/(Your Printer Model) *
NOTE: With Mac users, you must uninstall your Quad printer by going to System Preferences > Printers and deleting the printer, then reinstall it using the install.command located in the same folder you placed the new curves in. You will also need to restart your printing application if it was open when installing new curves. This will show the new curves in QuadTone RIP. You will not lose any of your previous curves when you uninstall the printer. The new curves location (as of 2016) is in /Applications/Piezography/Curves. This requires you to download and install the Piezography Community Edition first.

To DELETE QuadtoneRIP Curves:
To remove Piezography curves that you don’t need, or wish to clean up your curve list to only the curves you use, follow the instructions below.

(Windows) Open the curve folder C:\ProgramFiles\QuadToneRIP\QuadTone(Your Printer Model), then highlight and delete any curves you want to remove.

(Mac) With Mac, there are TWO folder locations that QTR references for curves, so you will need to delete unwanted curves from BOTH of the following locations:
1. /Applications/Piezography/Curves/(Your Printer Model)
2. Library/Printers/QTR/Quadtone/(Your Printer Model)
NOTE: With Mac users, you must uninstall your Quad printer model (in System Preferences> Printers & Scanners), then reinstall it using the install.command located in the same folder you removed curves from. You will also need to restart your printing application if it was open when installing or removing curves. This will show the modified curve list in QuadTone RIP.