Uninstalling 4Matrix - Error asks for file location
Older Windows applications require the original msi that was used to install the program in order to uninstall as well.
If you no longer have access to the original msi, you may be able to use a Windows Utility to force the removal.
Please see https://support.microsoft.com/en-gb/help/17588/fix-problems-that-block-programs-from-being-installed-or-removed for more information.