You can upgrade to Sentinel 8.0.1 from Sentinel 7.3 or later.
Download URL: https://dl.netiq.com/Download?buildid=M7_yJE9WOXE~ and NCC for appliance updates
Disclaimer: As with everything else at NetIQ Cool Solutions, this content is definitely not supported by NetIQ, so Customer Support will not be able to help you if it has any adverse effect on your environment. It just worked for at least one person, and perhaps it will be useful for you too. Be sure to test in a non-production environment.