It runs the program's own removal tool first.
To perform a silent installation of Your Uninstaller! PRO 7.5.2014.03, you typically need the setup executable (often named something like yupro75.exe or similar).
/SP- : Skips the "This will install..." prompt at the beginning.
After running the command, the installation should proceed silently. To confirm that the installation was successful, you can:
/VERYSILENT : Installs in the background without showing any windows or progress bars.