Everyone who pre-ordered this game should have gotten an email with the access key link (unless they got a refund back when the game was announced with a delay in 2017). I took the emails from the original page (now a demo page) and emailed each person that I could.
There are a few people who I was unable to contact because their email was now invalid and it bounced back to me. You can email me at hi@aeondreamstudios.com with your purchase receipt to get this sorted out. Thanks.