OK, so the moment EBF4 came out here, I loaded it up and bought the premium content because Matt is amazing. I have a screenshot of the "urchase confirmed" tab saved to my desktop if you need to see that.
The problem is that the game keeps forgetting that I bought premium. I've played through the vast majority of the game (up until halfway through the last area) on Epic using a lot of the stuff you get from the premium content, but now whenever I load up the game, all that stuff is gone and there's a button to buy premium when I already bought it.
Yesterday I was able to fix this by going to my profile on this site then going back to the game (not quite sure why, but that fixed it yesterday...) but today I booted the game up before lunch and played about an hour or so, premium content enabled, but now I'm back after lunch and it's forgotten again :\\