Select the intended VM instance in the left-hand navigation pane, and then click Power Off the virtual machine in the Getting Started tab.
Right click on the Virtual Machine name and select Turn Off from the menu.
Do not select Shut Down from the menu, it is not supported.
Right click on Virtual Machine name and select Shut Down and then Force Off.
Right-click on the Virtual Machine and then select Delete from Disk (Note: Do not use the Remove From Inventory choice)
Select the intended VM instance name, right-click and then click Delete.