To uninstall 4Matrix go to Control Panel > Programs and Features
Choose 4Matrix and select Uninstall
Choose 4Matrix Network Manager and select Uninstall
To delete the 4Matrix database go to Control Panel > Programs and Features and Choose Microsoft SQL Server 2014 Express (or whichever version of SQL you are using) and choose uninstall.
It will prompt you for which instance you’d like to uninstall. Do not do this if you are using it on another instance!
Delete any 4Matrix folders and their contents from the drive where you installed 4Matrix