Hello. This port is based on the original Morenatsu which had routes for Kounosuke, Tatsuki, Shun, Kouya, Shin and Juuichi. Torahiko is also available with the inclusion of the Unofficial Torahiko route. Any guides relating to the original 6 should still be accurate.
Regarding the download issue. The website does appear to have been slow lately. Otherwise, if you're getting a message regarding quarantine, it may be because of how recent i created my account to upload the port. There should be option to proceed if you got this message.
Hope I answered your questions.