The Patreon is currently suspended - I had a very demanding job which didn't leave me much time for me indie pursuits. Now that I'm back to working on SlipWays full-time, I'm thinking of reactivating it - but haven't done it yet. In any case, I've removed the misleading link from the description, thanks!
Currently, the best way to support the project is to either buy this version, or wait for the Indiegogo campaign and back it then! :)