gallery is for paid version
for pc: download the package somewhere, use a file extractor(i use 7-zip as suggested by dlsite) and you extract the file somewhere, then you just open it and find the application and open the application.
for android: i dont know sorry...
Nevermind sorry for the stupid question.
For anyone else, jashin posted the fixing instructions on ci-en(i just didnt refresh the page)
What error did you fix and how?
Jashin says on Ci-En to not save before reaching the boss, is that how?