Has HH always been offsite?
This version (v0.19.x) is not on Itch.io file server. v0.18.x worked with Itch App. I do not know what is the reason game is now “offsite”, I guess it is too big now, being 13 Gigabytes.
I play on Ubuntu Linux. Installing and updating means unpacking the zip to a directory. I have not considered that is much pain at all.