I think I know what it was, I set the minimum price up from $5.00 to $7.50 for the latest ones which I realised now would have locked access to buyers who paid $5.00 so I have put that back to $5.00 which makes sense. So in effect if you bought into it early, you get access to newer versions, I just need to keep that set to $5.00 for the duration of the project :/ My bad. Let me know if you have access now as I had to mess about with price setup and what is a demo and stuff.
I think this is an issue with raising prices at my end, apologies for that, I will keep the updates at $5.00 minimum moving forwards so you have full access to this project.
Cheers, Robert.