I think it will, but not sure. Without a record you risk an invalid license tho.You always need proof you qualify for an upgrade.If you registered w/ eovia that should help. Should be able to get a cc receipt or for a possible fee request a research. It looks like element 5 keeps records of that so I would make sure you check your account with them.I don't know how far it will go back, but it could be quite far. They do know who they issued to. If c4pro was acquired this way it should be trackable.

No need to think outside the box....
    Just make it invisible.