Hey there, glad you're enjoying the game! The download files on the main page are always the latest free release version, and based on what you wrote about talking to Isaiah, you have that version.
The latest free version ends when you get to pick whether to go to Matt's apartment, the frat party, or the club. If you're looking for the version of the game where you can go to Matt's apartment, that's currently only available in early access for Patreon patrons.
The update with Matt's apartment will be put up here for free on 3 September, so a little less than a month. If you don't mind paying for Patreon, you can pick it up now at patreon.com/FreshmenVN. Right now it's just up for $10/$15 USD patrons, but it'll be in early access for $6 patrons on the 13th.
I hope that helps! I'm happy to answer any other questions if I misunderstood what you were asking :)