itch.io

If you purchased it when it was 50% off, then you need to wait for 0.25 to go 5$, and then you will be able to download it 

Maybe not my place to tell you how to do things, but I would suggest adding a note about the early access. It might lessen the amount of people writing about this and in case they will, you can state to them that everything is written in the note and by not reading it, it's not the author's fault 

Welp, as you can see...Nothing has changed 

So, If I purchased the 0.8 when it was 5$, I am not able to download 0.9?

Good grace mate, you're a bloody legend