Thankyu for the answers, I am happy to hear there is no limit for Gahkthun. And to comment on the topic as well, I don't like the download limit. I do not know how much it really helps vs piracy but all I can see it do is hurt the people that do purchase the visual novel properly. I find myself uninstalling a lot of games and visual novels that I finished reading, only to download and install them again at a later time. The limit just hurts that.
While they apparently will offer more downloads if you contact their support, it really is just makes things less accessible to legit buyers, while the pirates do not have to deal with these limits at all.