I'd recommend you keep an eye o this thread until Symantec release a new version of the appliance:
https://www-secure.symantec.com/connect/forums/sva-installation-issue-unable-install-sva-comsymantecvsepvsepexception-bad-certificate-finger
Essentially, the copy you downloaded is the latest version, but it has an expired cert attached to it, which needs updating by the Symantec peeps.