Just an update as support seems to be using this tech note as the way to fix things. We updated the firmware on our vMX100 this morning and it fried it. When following the process above we ran into several issues.
In step 2/2 when we tried to stop the VM it was throwing a message about deny assignments. I finally just skipped this step.
In step 2/5, in order to delete the app you have to select the link for the app and then you will get a delete icon.
I would also suggest that you capture the config screen for your VM prior to going through this process so that you can remember some of the configuration items when you recreate the VM.
I hope this helps. Many thanks to James-VetaTek for the write up.