No I did not intend for that. Everyone who buys the game now, should not have to buy it again. Buying it now in early access is a sign of trust towards me and is rewarded by paying less then the end price for the finished product will be.
I hope Itch Support will be able to help you, if not, please contact me over Patreon or Subscribestar and I will send you a link where you can download the game.