vRanger no longer sees the virtual appliances
1. First verify that there are no jobs currently running in vRanger by selecting My Inventory and then click Refresh.
2. Next click on Tools | Options | Virtual Appliance | Configuration.
3. Remove the VAs assosciated with the Hosts that were upgraded, do not check the box that asks to delete the VAs from the ESXi Host(s).
4. Add the VAs back.