Cannot uninstall / install navigraph charts

When I try to install navigraph charts, I get the message “Installation Aborted - Setup was not completed successfully”.

When i try to uninstall a previous version, I get the message “Windows cannot find D:\Navigraph\Navigraph Charts\Uninstall Navigraph Charts.exe”.

Overall I cannot install a new version and cannot uninstall the previous version, so i cant use Navigraph Charts for Windows".