If you find yourself enjoying the game (we’re really glad you do!) and decide you want to upgrade your Standard Edition to a Deluxe Edition (and have purchased your pre-order through Steam), it will take requesting a refund so that you can purchase the Edition you want.
You can find here the steps to request a refund, which can be done at any time prior to the game’s launch. Once your refund is processed you can then purchase the Deluxe Edition.
Your character information and progress will be unaffected (outside of any wipes we perform between Alpha events).
Safe travels in Aeternum!