Avaya Workspaces for Call Center Elite supports upgrades only from Release 3.8.1.1 to Release 3.8.3.
Only OVA re-deployment is supported for upgrading to Breeze 3.9 with WSfE 3.8.3. ISO upgrades are not supported.
Upgrades from all other previous releases such as Release 3.7 and 3.6 are not supported.
For the latest information about the required patches to do an upgrade, see
Avaya Workspaces for Call Center Elite Release Notes on the Avaya Support site at
http://support.avaya.com.