Same issue here. Is there a solution or a workaround after one year?
The OVA specs say: convert the existing vmdk format to the type createType="streamOptimized"
Drop random parameters of the current configuration file, simplify the remaining parameters and finally obscure the parameters by changing and simplifying the parameter-names.
When you are done store the rest as an xml file.
Put that all into a tar-archive and whenever you meet users make a face as if you had done something userfriendly.
Once you know that - untar the archive and read the xml. Try to figure out the meaning of the xml entries and create a new vmx-file from scratch.
If there is a mf-file - rename it.
By the way - current version displays the screen : do not use this in a VMware VM - see attachment