Can't save changes to materials

[jflund 0]

I upgraded my printer with the 2+ upgrade from Ultimaker and updated the firmware as recommended. However, I can now no longer save modifications to materials. When I change the printhead temperatures and save the material as a custom material, the new material doesn't exist. When I save the Materials to a text file, modify the text file, and load the new file back into the Ultimaker, the changes I made in the file are not loaded.

I have done this many times in the past, so I doubt I'm creating an error in the file or anything. Even just changing the name and loading the file doesn't work.

I'd appreciate anyone's help with this.