Do you use Steam? If so, I can get you a Steam key. If not, I'll get a DL mirror for you. Message me on Discord (thepandaman) or email me (games.by.pandaman@gmail.com) and we'll figure it out. :)
I had a similar problem. What might help is to publish a zip containing just the files that changed since the previous chapter. That should be significantly smaller, considering how you've structured the game files.
