I was wondering if I were to pay the $5 for 0.8 would I have to pay for future updates. just wanted to know, would gladly buy again to help the creator.
No. But you would get the latest update on the day they cost $5. Version 0.9 is coming out soon and it will cost $10. If you spend $5, then you won't get it because you spent $5 instead of $10.
