Sorry if this is obvious, but I have looked high and low trying to figure this out.
I purchased the game through Paradox Entertainment. I received a confirmation email of my order. It stated that if it was a downloadable product, that the link would be in that email. It was not. I then received my product key.
I've done searches trying to find this on my own, but I can't find anything. I also linked my Paradox account with my Steam account. Any assistance would be greatly appreciated.
On a side note, for those responsible for this sort of thing, this has been a pretty horrible purchasing experience.