|Have you just downloaded it ( in other words is it a new install? )|
Uninstall it & download from here onto your desktop.
Uninstall the previous version using Revo & reinstall the new version.
Open Revo, double click on a program logo, click > Yes & then you get your options, with Advanced down the bottom.
If you have partially uninstalled your program, you get a message from Revo, that it can't find the uninstaller, hit Cancel & let Revo continue on, to search for the remnants.
If you get a reboot message, ignore it & do it after Revo has finished.
I use Advanced Mode. Screenshots of how to use.