Upgrading from Virtual Appliance for One Identity Safeguard for Privileged Passwords

We are moving from physical appliance to virtual appliance. 

I was asked by Quest Support to install 7.0LTS and then patch to 7.4, (same with 7.5) this wasn't possible, just got the below screen which from the KB article occurs on installing the OVA

https://support.oneidentity.com/one-identity-safeguard-for-privileged-passwords/kb/4259853/error-safeguard-is-starting-up-the-is-may-take-a-few-minutes

No troubleshooting was available so I decided to patch to 7.1.1 and then 7.3 both of which were successful can anyone offer any advice on why this doesn't work

I tried upgrading to 7.4.x and 7.4.1 had the same result. any workarounds\advice appreciated