Migrating Avada 4 to 5 - Purchase Code Trouble!


Old Viewer of mine, purchased and gifted me the Avada theme for event on my Stream. He sent me everything, including the *.pdf file with Purchase Code and everything else.
Now he moved away, and working hard, and we can’t get hold of each other, and I need to upgrade the theme from 4 to 5, but access to his ThemeForest account, I do not have.
Now my question is, is there a way to migrate the theme with purchase Code that he sent me, without access to his ThemeForest account?

I mean Avada deserves another re-purchase definitely for the SICK job done with the theme, but… currently I am running on budget, and if this is possible, it will be craziness!

Thanks A LOT for the help in advance!