If you used a site like Mega or MediaFire via a forum, check the "Description" or "ReadMe" text provided by the uploader.
If you are a supporter, the password is often listed in the specific post for that episode on the Lyk4n Patreon page. MyRealDesire-Ch.2Ep.4Part1-pc.zip
If you are looking for gameplay help after unlocking the file, community-created walkthrough guides are available on sites like Studocu and Scribd. If you used a site like Mega or