Wise InstallMaster 8

Hi, I have a broken installation of Wise InstallMaster 8.0 and need to re-install.  The software was installed a few years ago and there's no sign of the installer for Wise.  Does anyone know where I can find an installer for verion 8.0 or version 8.1 and how I can get a copy of our key from Symantec ?

Any help will be gratefully appreciated.