How do I download just the update and not the entire game again?
Viewing post in Weekly Update: v0.17.0! comments
Commented this on your identical post on the main page, but just in case anyone stumbles upon this and has the same question:
If you're on Windows, Linux or Mac just download the Itch app and it will patch the game for you :) If you're on Android then unfortunately you have to download the full update - Ren'py (the SDK I use) doesn't allow for APK patches.