Yes, you must have missed that post. I just did that but it won't connect. It did when I had a Belkin router but not with TP-link. I am pretty sure I have to connect my Mac to the router via ethernet to do anything with it. Too lazy.
I had a feeling that you had already tried and failed with that URL, but it was worth making sure.
I guess your having to connect to your router with hard wire is a security feature in that it requires physical access to change anything, but it's certainly a nuisance when it seems like a reeeally
strong password would suffice. (Aside: I don't get why my preinstalled network password is stronger than my preinstalled router password. It seems like it should be the other way around.)