Clean Install MatterControl
How to do a clean installation of MatterControl on Windows, Mac OS X, or Linux:
Clean Install Windows
Step 1: Open the Control Panel
Step 2: Select the "Uninstall a Program" option in the Control Panel window
Step 3: Select MatterControl from the list of programs and then click the Uninstall button.
Step 4: Navigate to C:\Users\%USER%\AppData\Local folder and delete the MatterControl folder
Step 5: Download MatterControl and run the installer.
Clean Install Mac OS X
Step 1: Navigate to the Applications folder on your file system and delete MatterControl.app
Step 2: Navigate to /Users/username/.local/share/ and delete the MatterControl folder
Step 3: Download MatterControl
Step 4: Run the installer
Clean Install Linux
Step 1: Open the Terminal
Step 2: Run sudo apt-get --purge remove MatterControl
Step 3: Download and build MatterControl from source.
See also: Running on Linux