How to uninstall old version of LibreOffice?

I uninstalled the LibreOffice to install new one. I uninstalled LO via Revo. Then, I download the new 4.1.1 version of LO. I want to setup LO, I clicked the setup file. Some progress passed then an error page appear and said this “Error 1714. cannot uninstall version of LibreOffice Contact the support group” How can I uninstall old version of LO ?
My system is Windows 7 x64

Please have a look at Tagged “error-1714”.