silently uninstalling toad

we are having an unlicensed toad ver (cracked software) which is installed by a .exe and not by a MSI .i want to uninstall it unattended and silently. I created a .bat file as follows
“c:\program path\uninstall.exe”/s

This works but it pops up a box asking the location of a INSTALL.LOG file which is in the same program path. When i show the path of the INSTALL.LOG file manually it starts the uninstall and finishes successfullyHow could i automate this? What switches should i add to the .bat file?Please help