If your using VMware’s Hypervisor V5.5 you may come up with the error where you cannot manage your VM using the vSphere Client due to the VM version being 10 which can only be managed through the CLI or the webclient, the fix is to downgrade using the vCenter Converter Standalone, located here:
Download VMware vCenter Converter Standalone
Now you’ll be able to convert from version 10 to 9 and manage your VM.