Matter Control not working on MAC OS Mojave 10.14.4

ctkjose

Matter Controls crashes on launch with the following error:

at MatterControlMac.MainClass.Main (System.String[] args) [0x00007] in :0
[ERROR] FATAL UNHANDLED EXCEPTION: System.TypeInitializationException: The type initializer for 'MatterHackers.MatterControl.SlicerConfiguration.ProfileManager' threw an exception. ---> System.NullReferenceException: Object reference not set to an instance of an object

In my case I had a previous version of Matter Control 1.5 installed and I was able to fix it by removing the user data for Matter Control.

The data is in a ".local" folder in your home folder instead of the expected "Application Support" folder in my case:

/Users/ctk/.local/share/MatterControl

In the terminal you can type to rename the old folder or just delete it:

mv ~/.local/share/MatterControl ~/.local/share/MatterControl_OLD