Open the directory where the program is installed and you will see a file named Install.log. Cut the file, paste it on your desktop and double click the uninstaller (uninstall.exe). It will ask you to open the installation log. Locate to the install.log file on your desktop and the uninstall will work fine. Also you can try using Revo Uninstaller. Even if it can't uninstall the application normally, it will force it to uninstall by wiping out all traces of its presence from the system.
After that, try running AdwCleaner to make sure that there are no leftover rogue registry keys or toolbars in your system.