Uninstall question


If i want to upgrade the engine of my actual antivirus program (KAV) i suppose that i will be forced to uninstall/reinstall Comodo FW (free version). Have you got a Comodo uninstaller to proceed or can i just use the
Comodo FW configuration Wizard (=> Start Menu) to run the uninstall procedure. Will all registry-entries be cleaned up during the unistall , or do you suggest me to run RegSuprme ? Should i disable the FW before uninstalling ? Thanks in advance for your advice on this subject.
Berny +++