Ender 3 V3 KE - impossible to add material

Hello everyone. Does anyone have a problem after installing Creality Print 6 with not being able to add new print material. I can’t seem to do it. I only have the option to add the 6 basic ones from Creality and nothing more. When I click on add I have no option. If I change the printer to K2 for example, it’s OK. But for Ender 3 KE it disappeared. I also tried going back to Creality Print 5.1, which I seem to have uninstalled in a hurry, but it’s the same there. I used to be able to use about 30 different materials with this printer. Can anyone tell me where the problem is?