h5ngcVA-5.0.0 -15670023_OVF supproted the vsphere 6.0 u3, the windows VC with embedded PSC?
It should work. Check the documentation.
If you have your old H5 fling appliance and if it was version 4+ you can directly copy the configuration files from it.
Copy the /etc/vmware/vsphere-ui/webclient.properties, /etc/vmware/vsphere-ui/store.jks and /etc/vmware/vsphere-ui/config/ds.properties to the same folders on the new appliance.
Make sure they are owned by the user vsphere-ui and have 770 permissions.
Just a quick tip for your current configuration files. Can you check if they had Windows EOF?
$> hexdump -c /etc/vmware/vsphere-ui/webclient.properties
$> hexdump -c /etc/vmware/vsphere-ui/config/ds.properties
If you see in any of the dumps \r\n then you should remove all the \r from the file.
To remove the \r you can use the 'tr' command.
cat webclient.properties | tr -d '\r' > webclient.properties