Windows installer after un-installing Smart FTP

I can't install or uninstall from windows installer. I uninstalled before and the same thing happend again. The last time this happend I had to reformt my PC. I just rebuilt my machine and install Smart FTP and ended up not needing it and the same thing happend again. How do I rebuild or reinstall the windows installer? I read all the faq sheet and there is nothing that has fixed it yet. This software doesn't like to removed I guess. I need this fixed

The Installer/Uninstaller works flawless on most user based systems.

The installer is based off of the (MSI) from microsoft, which comes pre-installed with all 2000/XP systems.

If you can't resolve the (MSI) problem you are having, then please use the Alternate setup. Which does not use the (MSI).

https://www.smartftp.com/download