WeTransfer should work fine, however I have updated the download links to Mega transfer if it's causing confusion.
That change is in effect now...Let me know if the download issue persists.
Also, you bring up a good point...My intent wasn't to have people pay whenever there's an update, and to be able to obtain the updates until the game is complete once purchased. I'll look at how to update the payment model to account for previous purchases while still making older chapters FTP.
EEYU, I can refund you your $9 once you've downloaded. Just message me.