Hey Chevy!
We have a patch system over on our Patreon. Where it updates the game from X version to X.
You can have a look here:
https://www.patreon.com/c/Zanith/posts
You can search for "free" in the search box and it'll give you a list of all the free versions.
(You can only patch the high-res version with the high-res patch, and compressed with compressed, you can't mix and match. The patch system only works for the PC version of AHITR).