TY! I figured out the issue. After I upgraded from mid tier to highest tier subscription, I was allowed access.
Hey there! I only now saw your message on Itch, but I haven't seen any messages from you on Patreon, alas! Where did you post your question? It must have fallen through the cracks (Patreon also doesn't notify me about any personal messages). I'm sorry it took so long to reply.
Yes, only the Plus tier has access to Plus content.
Hello! If you're a Patreon, please follow the Patreon instructions, it has the download link: https://www.patreon.com/posts/welcome-patrons-19940305