There isn't an upgrade path from one version to another. What I've been doing is using powervmdsc to do a Get-VMDSCAll and list the current configs, then piping that output to a CSV file. Then I use that CSV file as the input to a Clear-VMDSC for-each loop. So now the current VMDSC appliance has no pending configs, and I have a CSV of the pending configs I want on the new one. I then power off the current appliance, and deploy the new one. (Before powering off the old appliance it is important that there are no pending configurations).
Once the new appliance is deployed use the Add-VMDSC command on a for-each loop with your CSV files of configurations you exported from the old appliance.
Hello,
Are there any issues / or recommendations when upgrading an existing VMDSC appliance?