Stop the program. The generator number box should turn from green to red.
-Go to the Presets tab and choose a program or shell program and create a new program.
-Once a new program is created, go to the Control tab, check the OVERWRITE button, and THEN click the red generator number box that you want to attach the program to.
-The new program should be loaded into the area and click Start. (generator number box will go from red to green)
For more details, please check the link: